Question 1

can I install my APEC RO system in my garage? it gets cold in winter.

Accepted Answer

DIAGNOSIS Installing the APEC ROES-50 in an uninsulated or non-climate-controlled garage exposes the system to extreme temperature fluctuations that the components are not engineered to withstand. The primary failure point is the expansion of water during the freezing process. Because the ROES-50 utilizes rigid plastic filter housings and a pressurized steel storage tank, any water trapped within these components will expand as it turns to ice, creating internal pressure that exceeds the tensile strength of the plastic and metal. This typically manifests as hairline fractures in the sediment and carbon filter housings or a complete rupture of the internal bladder in the storage tank. Furthermore, the Semi-Permeable Membrane (the core of the system) is highly sensitive to temperature; extreme cold increases water viscosity, which drastically reduces the permeate flow rate, while freezing can physically tear the delicate membrane layers, rendering the system incapable of removing contaminants. You can confirm a temperature-related failure if you notice "weeping" leaks from the bottom of the housings or a sudden drop in water pressure at the faucet following a cold snap. FIX To ensure the longevity of your APEC ROES-50, you must relocate the system to a permanently sheltered, indoor environment where the ambient temperature remains consistently between 40°F and 100°F (4°C to 37°C). Follow these steps for a proper indoor installation: Shut off the cold water supply valve and open the RO faucet to bleed all remaining pressure from the lines. Carefully disconnect the feed water tubing from the source and the drain line from the waste pipe. Relocate the entire unit—including the four-stage filter assembly and the pressurized storage tank—to a kitchen cabinet or a utility room. Ensure the unit is mounted vertically against a wall using the provided brackets to prevent the heavy filter housings from putting stress on the tubing connections. Reconnect the feed water adapter to the cold water line using a 1/4" tubing connector and secure the drain saddle to the sink waste pipe. Flush the system by filling the storage tank and draining it completely two times to remove any air pockets or carbon fines introduced during the move. IF THAT DIDN'T WORK If you have no indoor space and are absolutely forced to use the garage, you must implement these mitigation strategies, though they do not guarantee protection against extreme freezes: Install a dedicated, insulated enclosure or "hot box" around the entire system. This box should be lined with R-13 rigid foam insulation and equipped with a thermostatically controlled space heater or a heavy-duty heat tape (pipe wrap) wrapped around every inch of the tubing and the base of the filter housings. Install a freeze-protection valve on the main feed line. This valve automatically shuts off the water supply if the temperature drops near freezing, preventing new water from entering the system and freezing inside the housings. Upgrade your tubing to reinforced, insulated braided lines for the run from the main water source to the RO unit to prevent the "entry point" from freezing and bursting. Utilize a digital thermometer with a high/low alarm set to 42°F. If the alarm triggers, you must manually drain the system via the storage tank valve to remove the water before it crystallizes. HEADS UP Direct sunlight is as dangerous as cold; UV rays degrade the plastic tubing and can cause the filter housings to become brittle and crack over time. Keep the system shielded from windows. If the system ever freezes, do not attempt to "thaw" it with a heat gun or torch, as this will warp the plastic housings and compromise the seals, leading to catastrophic leaks. Always check the O-rings in the filter housings during your 6-month filter changes; temperature swings can cause these rings to flatten or crack, which is the most common cause of slow drips. Ensure the storage tank is placed on a level surface; if it tilts in a garage setting, the internal bladder may shift, leading to uneven pressure and reduced water capacity.

Question 2

APEC ROES making a gurgling sound from the drain line, is that okay?

Accepted Answer

DIAGNOSIS The gurgling sound you hear in the APEC ROES-50 is typically the result of "concentrate" water (the brine water containing the filtered impurities) being pushed through the drain line and into your sink's waste pipe. Because the ROES-50 uses a flow restrictor to create backpressure against the membrane, the water doesn't flow in a steady, silent stream; instead, it often pulses or creates small air pockets as it enters the drain saddle. This is a normal byproduct of the osmotic process, specifically when the system is in "production mode" to refill the storage tank. To confirm if this is normal operation, observe the system's pressure gauges. If the gurgling occurs only when the tank pressure is low (usually below 30 PSI) and stops once the tank is full and the automatic shut-off valve (ASO) closes, the system is functioning correctly. However, if the gurgling is constant—even when the tank is full—or if it sounds like a violent "sucking" noise, you likely have a breach in the vacuum seal of the drain saddle or a blockage in the waste line causing air to be pulled backward into the system. FIX If the gurgling is excessive or constant, you need to ensure the drain line is airtight and positioned correctly to prevent air intrusion. Follow these steps to optimize the drain assembly: Locate the drain saddle clamp (the plastic piece bolted to your sink's drain pipe). Loosen the two nuts on the saddle using a 7/16" wrench. Inspect the rubber gasket inside the saddle. If it is pinched, skewed, or has a hairline crack, it will allow air to leak in, causing the gurgling sound. Replace the gasket if it is deformed. Ensure the 1/4" drain tubing is pushed firmly into the saddle's compression fitting. Use a small pair of pliers to ensure the locking clip is fully seated over the tubing to prevent air leaks. Check the slope of the drain line. Ensure the tubing runs downward toward the drain pipe without any "loops" or "humps." A loop in the line creates an air trap that causes a bubbling or gurgling sound as water struggles to push past the air pocket. Tighten the saddle nuts firmly, but do not over-torque them, as over-tightening can crack the plastic housing or pinch the rubber gasket, creating a leak. IF THAT DIDN'T WORK Check for a Clogged Flow Restrictor: If the gurgling is accompanied by a very slow tank refill time, the flow restrictor (the small plastic inline piece on the drain line) may be partially clogged. Replace the restrictor with a new 32 GPD or 40 GPD unit to restore proper pressure balance. Verify the ASO Valve Function: If the gurgling never stops, your Automatic Shut-off (ASO) valve may be failing. This means the system is constantly sending water to the drain even when the tank is full. Test this by closing the tank valve; if the gurgling continues for more than 10 minutes, the ASO valve is faulty and needs replacement. Inspect the Drain Pipe for Blockages: A partial clog in your sink's main drain pipe can cause water to back up, forcing air bubbles back up the RO drain line. Try using a plastic drain snake or a commercial drain cleaner on your sink to ensure the waste line is completely clear. Relocate the Saddle: If the saddle is installed too close to a P-trap or a T-junction in your plumbing, turbulence from the sink's main flow can cause air to be pushed into the RO line. Move the saddle 3-5 inches further up the pipe, away from the trap. HEADS UP Avoid Kinking: Never bend the 1/4" drain tubing at a sharp 90-degree angle. Use wide arcs to prevent "air locking" which causes the gurgling to intensify. Saddle Placement: Always install the drain saddle above the P-trap of your sink to prevent sewage gases or wastewater from backing up into your RO system. Leak Monitoring: Whenever you tighten the drain saddle, wipe the area dry and wrap a piece of toilet paper around the fitting. If the paper gets damp, you have a slow leak that needs immediate correction to avoid cabinet water damage. Filter Cycle: Remember that as the pre-filters (Sediment and Carbon) become clogged, the pressure dynamics change, which can sometimes alter the sound of the drain flow. Replace pre-filters every 6-12 months.

Question 3

my APEC water system tank seems to have very low pressure, barely any water comes out of the faucet. how do I check it?

Accepted Answer

DIAGNOSIS The APEC ROES-50 utilizes a pressurized storage tank containing a food-grade rubber bladder that separates the purified water from a cushion of compressed air. This air pressure is what pushes the water up through the tubing and out of your faucet. When you experience a "trickle" or very low flow, it is almost always because the air bladder has lost its pre-charge pressure over time or has developed a slow leak. Without sufficient air pressure, the water cannot be displaced from the tank, even if the tank is physically full of water. To confirm this is the issue, perform a "weight test." Lift the tank or try to tilt it. If the tank feels incredibly heavy (like it's full of water) but only a few ounces of water come out of the faucet, the bladder has lost its charge. If you open the faucet and it flows strongly for two seconds and then dies completely, the tank is likely empty and the RO membrane is the problem. However, if the flow is consistently weak and slow despite the tank feeling heavy, the air pressure is the root cause. FIX To restore the pressure in your ROES-50 tank, you will need a low-pressure tire gauge (capable of reading 0-60 psi) and a manual bicycle pump or a small compressor with a regulator. Isolate the Tank: Locate the blue plastic valve on top of the storage tank. Turn the valve 90 degrees to the "off" position to shut off the water flow from the system to the tank. Drain the Tank: Open the RO faucet on your countertop. Let the water run until the flow stops completely. To ensure the tank is 100% empty, keep the faucet open while you perform the next steps. If water continues to drip, the tank is not fully drained. Locate the Air Valve: Find the Schrader valve (the same type found on car tires). It is typically located on the side or bottom of the tank, often protected by a small plastic cap. Remove the cap. Measure Current Pressure: Press the tire gauge firmly onto the valve. For an empty tank, the reading should be between 7 and 8 psi. If it reads 0-3 psi, the tank is under-pressurized. Inflate the Bladder: Using your pump, add air in short bursts. Check the pressure frequently. You must reach exactly 7-8 psi. Do not exceed 10 psi, as over-pressurizing will reduce the actual volume of water the tank can hold. Restore Service: Once 7-8 psi is achieved, close the RO faucet and turn the blue tank valve back to the "on" position. Allow the system to refill (this may take several hours) before testing the flow again. IF THAT DIDN'T WORK Check for a Ruptured Bladder: While pressing the Schrader valve pin with a small screwdriver or nail, look at what comes out. If water squirts out of the air valve instead of air, the internal rubber bladder has ruptured. The tank is permanently damaged and must be replaced with a new APEC compatible storage tank. Inspect the RO Membrane: If the tank was empty and the pressure was correct, but it refuses to refill, your RO membrane (the large center canister) may be fouled or clogged. Check the waste-water line; if no water is flowing to the drain, the membrane is likely blocked. Verify the Auto-Shutoff Valve (ASO): If the system never stops making noise or the tank never fills, the ASO valve may be stuck. This prevents the system from building the back-pressure needed to stop the water feed, leading to an inefficient fill cycle. Check the Faucet Aerator: Occasionally, the low flow is not a pressure issue but a clog in the faucet head. Unscrew the small aerator screen at the tip of the RO faucet and check for calcium buildup or debris. HEADS UP Never Pressurize a Full Tank: Adding air while the tank is full of water can cause the bladder to rupture or create dangerous internal pressure. Always drain the tank completely before using a pump. Avoid High-Pressure Compressors: Do not use a heavy-duty automotive compressor. These can jump from 0 to 30 psi in a split second, which can blow out the bladder. A manual bicycle pump is the safest tool for this job. Annual Maintenance: Air pressure naturally migrates through the bladder walls over time. It is a good practice to check and top off the tank pressure every 12 months during your filter changes. Temperature Sensitivity: In very cold garages or basements, air pressure will drop naturally. If your system is in an unheated area, you may need to adjust the pressure more frequently.

Question 4

installing my APEC ROES-50, can I drill through granite for the faucet? what size bit?

Accepted Answer

DIAGNOSIS Drilling through granite for the APEC ROES-50 faucet is a high-risk operation because granite is an igneous rock with a high quartz content, making it extremely hard and brittle. Unlike laminate or acrylic, granite cannot be cut with standard high-speed steel (HSS) or titanium bits; attempting to do so will result in the bit overheating, dulling instantly, and potentially cracking the countertop due to excessive pressure or thermal shock. The primary challenge is the "bite" of the drill. Because granite is non-porous and slick, a standard bit will skate across the surface, leaving permanent scratches on your stone. To successfully install the faucet, you must use a diamond-core hole saw. This process removes a cylinder of stone rather than grinding it away, which minimizes the risk of fracturing the slab. Confirmation of the correct tool is simple: if the bit does not have a diamond-grit coating on the cutting edge, it is not suitable for granite. FIX To install the standard ROES-50 faucet, follow these precise steps to ensure a clean hole without cracking the stone: Select the Correct Bit: For the standard APEC faucet, use a 1/2" diamond-core hole saw. If you have upgraded to an air-gap faucet, you will need a 1 1/4" diamond-core bit. Prepare the Surface: Place a piece of masking tape or a painter's template over the drilling area. This prevents the drill bit from "walking" or skating across the granite during the initial start. Set Up Water Cooling: Granite drilling requires constant lubrication to prevent the diamond edge from burning out. Use a spray bottle with water or have a helper continuously drip water onto the drilling site. Initial Angle Entry: Start the drill at a 45-degree angle to create a small "notch" or indentation in the stone. This provides a seat for the bit and prevents it from sliding. Vertical Drilling: Once the notch is established, bring the drill to a 90-degree angle. Use a variable-speed drill set to a medium speed. Do not apply heavy downward pressure; let the diamond grit do the work. Clear Debris: Periodically lift the bit slightly while it is spinning to allow the water to flush out the granite slurry (grey paste) from the hole. Final Pass: As you feel the bit break through the bottom of the slab, reduce pressure significantly to avoid "blowout" (chipping the underside of the granite). IF THAT DIDN'T WORK Professional Installation: If you encounter a "vein" of harder mineral or the stone begins to spider-web, stop immediately. Contact a local stone fabricator. They use professional-grade wet-core drills that use a vacuum system to manage slurry and high-torque motors that prevent the bit from binding. Under-Sink Mounting: If you are uncomfortable drilling the granite, consider mounting the faucet to the sink rim if it is a stainless steel or cast iron model. This avoids the stone entirely and only requires a hole through the metal. Diamond Paste/Lubricant: If the bit is overheating despite using water, switch to a dedicated diamond drilling lubricant or a mixture of water and a small amount of dish soap to reduce surface tension and improve cooling. Bit Replacement: If the bit stops cutting and simply spins, the diamond segments have likely glazed over. You can sometimes "dress" the bit by drilling through a piece of scrap abrasive stone or replacing the diamond core entirely. HEADS UP Avoid Hammer Drills: Never use the "hammer" or "percussion" setting on your drill when working with granite; the impact will shatter the stone's internal structure and cause a full-length crack. Check for Underside Clearance: Ensure there are no plumbing pipes, supports, or electrical wires directly beneath your drilling point before starting. Seal the Hole: After drilling and installing the faucet, apply a small bead of clear 100% silicone sealant around the base of the faucet where it meets the stone to prevent water from seeping into the cabinetry below. Safety Gear: Always wear safety goggles. Granite shards are like glass and can fly off at high speeds during the breakthrough phase.

Question 5

how often do I need to change the filters on my APEC ROES-50? and which ones first?

Accepted Answer

DIAGNOSIS The APEC ROES-50 utilizes a multi-stage filtration process where each stage protects the next. The primary cause of system failure or slow water production is the "clogging" of the three pre-filter housings. When the sediment filter (Stage 1) and the dual carbon blocks (Stages 2 and 3) become saturated with particulates and chlorine, they create a pressure drop. This forces the RO membrane (Stage 4) to work harder, leading to premature fouling or "scaling" where minerals crystallize on the membrane surface, permanently reducing the Gallons Per Day (GPD) output. You can confirm it is time for a change by monitoring the flow rate of the storage tank. If the tank takes significantly longer to refill or if the TDS (Total Dissolved Solids) reading on a handheld meter begins to climb above 10% of your tap water's baseline, the membrane is likely compromised. However, if the water tastes like chlorine, your carbon blocks are exhausted and must be replaced immediately to prevent chlorine from chemically burning holes in the RO membrane. FIX To maintain the ROES-50, follow this specific sequence and schedule. Always change the pre-filters before the membrane to ensure the new membrane isn't immediately contaminated by old debris. Pre-Filters (Stages 1-3): Every 6 to 12 Months. Shut off the cold water supply valve and open the RO faucet to relieve pressure. Use the provided housing wrenches to unscrew the three canisters. Replace the 5-micron sediment filter first, followed by the two GAC/Carbon block filters. Lubricate the black O-rings with a food-grade silicone grease to ensure a watertight seal. Tighten the housings firmly, but do not over-tighten, as this can crack the plastic sumps. RO Membrane (Stage 4): Every 24 to 36 Months. Locate the membrane housing (the horizontal tube). Push the membrane out of the housing using the removal tool or a blunt object. Insert the new membrane, pushing firmly until you feel it "seat" into the brine seal. Ensure the seal is tight to prevent "cross-over," where raw water bypasses the membrane into the product tank. Post-Carbon Polishing Filter (Stage 5): Every 12 Months. This is the final horizontal filter before the faucet. Unscrew the plastic nuts on both ends of the filter. Replace the filter and tighten the nuts by hand to avoid stripping the threads. IF THAT DIDN'T WORK Check the Auto Shut-Off Valve (ASO): If the system continues to run water into the drain even after the tank is full, the ASO valve (the small square component where four tubes meet) may be stuck. Gently tap it with a screwdriver handle or replace the valve entirely. Inspect the Storage Tank Pressure: If you have filtered water but it only flows for a few seconds, the bladder in the tank has likely lost its air charge. Use a tire gauge to check the valve on the bottom/side of the tank; it should be pressurized to 7-10 PSI when the tank is empty. Verify the Flow Restrictor: If the waste water line is barely dripping or flowing too fast, the flow restrictor (the small plastic piece in the drain line) may be clogged or failed, which prevents the membrane from properly flushing contaminants. Sanitize the System: If you notice a "musty" smell after changing filters, the housings may have developed a biofilm. Use a small amount of unscented bleach or a dedicated RO sanitizing solution in the first housing before installing new filters. HEADS UP Flush the Carbon: Always run the first 2 gallons of water through the system after changing carbon filters to remove "carbon fines" (black dust) before letting the water enter the storage tank. Avoid Overtightening: Using a wrench to tighten the final plastic nuts on the post-filter can easily crack the housing. Hand-tight is sufficient. TDS Monitoring: Invest in a digital TDS meter. Testing your water once a month is the only way to know exactly when your membrane is failing, regardless of the 2-year guideline. Leak Detection: After any filter change, wrap a dry paper towel around every connection. Even a microscopic drip can cause significant cabinetry damage over time.

Question 6

APEC ROES-50 drain line is constantly running water, even when the tank is full. is this normal?

Accepted Answer

DIAGNOSIS A constant stream of water flowing into the drain line on an APEC ROES-50 system is not normal behavior once the storage tank has reached full capacity. In a properly functioning system, the Automatic Shut-Off Valve (ASOV) located in the RO head assembly is designed to stop the flow of feed water into the membrane once the back-pressure from the full storage tank reaches a specific threshold. When water continues to run to the drain, it indicates that the ASOV is failing to "seat" or close, allowing water to bypass the membrane and exit through the waste line indefinitely. This failure is typically caused by one of three things: a ruptured internal diaphragm within the ASOV, a buildup of mineral scale or sediment preventing the valve from closing fully, or a malfunctioning check valve (the one-way valve located at the exit of the membrane housing). If the check valve fails, water from the storage tank leaks back through the membrane and out the drain, which tricks the ASOV into thinking the tank isn't full, keeping the valve open in a perpetual loop. You can confirm this by closing the tank ball valve; if the drain water stops immediately, the issue is likely the check valve. If the drain continues to run even with the tank closed, the ASOV itself is the culprit. FIX To resolve a constant drain flow, follow these precise steps to isolate and fix the valve assembly: Verify Tank Pressure: Close the blue ball valve on top of the storage tank. Open the RO faucet and let the water run until it stops. If the drain line is still running water while the tank is isolated, the ASOV is definitely stuck or broken. The "Impact" Method: While the system is pressurized, use the handle of a screwdriver to lightly tap the plastic body of the Automatic Shut-Off Valve (the small component where the feed water line enters the RO head). Sometimes a small piece of debris or calcium scale prevents the diaphragm from seating; a physical jar can often snap it shut. Check Valve Inspection: Locate the elbow fitting where the pure water exits the membrane housing before entering the ASOV. If you hear a clicking sound or see water flowing back toward the membrane when the tank is closed, the internal check valve seat has failed. You must replace the membrane housing outlet fitting or the entire membrane element if the check valve is integrated. ASOV Replacement: If tapping fails and the check valve is functional, the ASOV diaphragm has likely perished. Shut off the main feed water supply and open the RO faucet to bleed pressure. Use a wrench to unscrew the ASOV from the RO head. Replace it with a genuine APEC replacement valve. Ensure the O-rings are lubricated with a small amount of food-grade silicone grease to prevent leaks during installation. System Reset: Once the part is replaced, open the feed water valve and allow the tank to fill completely. Monitor the drain line for 30 minutes after the tank is full to ensure the flow has completely ceased. IF THAT DIDN'T WORK Replace the RO Membrane: If the membrane is severely fouled or has developed a tear, it may not create enough osmotic pressure to trigger the ASOV. If your membrane is older than 24 months, replace the ROES-50 membrane element entirely. Check Feed Water Pressure: Use a pressure gauge to ensure your incoming water pressure is between 40 and 80 PSI. If the pressure is too low (below 30 PSI), the ASOV may not have enough force to snap shut, or the system may never reach the pressure required to shut off the flow. Inspect the Pre-Filters: Check the three pre-filter canisters. If the sediment or carbon filters are completely clogged, the pressure drop across the filters can cause erratic behavior in the ASOV, preventing it from closing properly. Verify Tank Air Pressure: With the tank empty of water, use a tire gauge to check the air valve at the bottom of the tank. It should be between 7 and 10 PSI. If the air pressure is too low, the tank won't provide the necessary back-pressure to trigger the ASOV. HEADS UP Avoid Over-tightening: When replacing the ASOV or fittings, do not over-tighten the plastic nuts. This can crack the housing or deform the O-rings, leading to slow leaks that are harder to diagnose than a running drain. Monitor Waste Ratios: A healthy ROES-50 system should produce significantly more waste water than pure water during the filling process, but it must stop completely once the tank is full. If you notice the drain running during the filling process is excessive, check for kinks in the waste line. Sanitization: Whenever you open the RO head assembly to replace the ASOV, it is a best practice to sanitize the system using a diluted bleach solution or a commercial RO sanitizer to prevent biofilm buildup in the new valve. Check for Leaks: After any repair, wipe all connections with a dry paper towel. Even a microscopic drip at the ASOV connection can lead to water damage over time.

Question 7

my APEC reverse osmosis system just stopped making water completely. the tank is empty. help?

Accepted Answer

DIAGNOSIS When an APEC ROES-50 system stops producing water entirely and the storage tank is empty, the root cause is typically a complete failure of water flow into the membrane housing or a catastrophic failure of the auto-shutoff valve (ASOV). Because the ROES-50 relies on osmotic pressure, any restriction in the feed line or a failure in the pressure-sensing mechanism will halt production. If the tank is empty but no water is flowing from the faucet, the system is likely "stuck" in a shut-off state or the membrane has become completely fouled/clogged. To confirm the source of the failure, check the waste water line (the small tube leading to the drain). If water is constantly flowing down the drain but the tank is empty, the membrane is likely ruptured or bypassed. If there is absolutely no water flowing to the drain and no water at the faucet, the problem is upstream: either the feed water valve is closed, the pre-filters are completely impacted with sediment, or the ASOV has failed mechanically, tricking the system into thinking the tank is full when it is actually empty. FIX Follow these steps in precise order to restore water flow to your ROES-50 system: Verify Feed Water Supply: Locate the saddle valve or dedicated shut-off valve where the system connects to your cold water line. Ensure the handle is turned perpendicular to the pipe (Open). If you have a separate shut-off valve at the base of the system, ensure it is fully open. Inspect the Tank Valve: Locate the blue ball valve on top of the storage tank. The handle must be aligned with the pipe (parallel) to be open. If the handle is perpendicular to the pipe, the tank is isolated, and no water will reach the faucet. Test for Filter Blockage: If the feed valve is open but no water is produced, the sediment filter (Stage 1) may be completely clogged. Close the feed water valve, unscrew the first stage housing using the provided wrench, and check for heavy sludge. If the filter is blackened or brown, replace it immediately. Reset the Auto-Shutoff Valve (ASOV): The ASOV is the small plastic component with four tubes connected to it. Sometimes the internal diaphragm sticks. Gently tap the side of the ASOV with the handle of a screwdriver to dislodge any debris or stuck seals. Check for Air Locks: If you recently changed filters, air may be trapped. Open the RO faucet and leave it open for 2-3 minutes while the feed water is on. This forces air out of the membrane housing and allows the ASOV to trigger correctly. IF THAT DIDN'T WORK Replace the RO Membrane: If you have water flowing to the drain but nothing going into the tank, the TFC membrane (Stage 4) has likely failed or become "scaled" over. Remove the membrane housing cap, pull out the old membrane, and slide in a new APEC-compatible 50 GPD membrane. Ensure the O-rings are lubricated with food-grade silicone grease to prevent leaks. Check the Storage Tank Pressure: The tank uses a rubber bladder and compressed air. If the tank feels heavy (full of water) but nothing comes out of the faucet, the bladder may have ruptured or lost its air charge. Use a pressure gauge on the air valve (Schrader valve) at the bottom of the tank. It should read 7-10 psi when empty. Use a bicycle pump to add air if necessary. Replace the ASOV: If the system refuses to produce water and the filters are clean, the Auto-Shutoff Valve may have a failed internal seal. Purchase a replacement ASOV and swap the four lines carefully, ensuring each tube is pushed firmly into the quick-connect fittings. Verify Incoming Pressure: If your home water pressure has dropped below 40 psi (due to a failing pressure regulator or city maintenance), the ROES-50 will stop producing water. If your pressure is consistently low, you will need to install a permeate pump or a booster pump to force water through the membrane. HEADS UP Pressure Warning: Never operate the system if your incoming water pressure exceeds 85 psi; doing so can crack the plastic housings or blow out the ASOV seals. Install a pressure reducing valve if necessary. Sanitization: Whenever you open the system to replace the membrane or filters, it is a best practice to sanitize the housings with a diluted bleach solution to prevent biofilm buildup. Filter Schedule: To prevent total system shutdowns, replace the three pre-filters every 6 months and the RO membrane every 24 months. Leak Detection: After performing any of the fixes above, run the system for 30 minutes and check every connection point with a dry paper towel to detect slow drips.

Question 8

i see air bubbles in the water from my apec ro faucet, is my system broken?

Accepted Answer

DIAGNOSIS In the vast majority of cases with the APEC ROES-50, "milky" or "cloudy" water is not a sign of a mechanical failure, but rather a phenomenon called aeration. When you replace the three pre-filters or the RO membrane, air becomes trapped within the filter housings and the permeate line. Because the ROES-50 utilizes a pressurized storage tank, this air is compressed into the water. When you open the faucet, the sudden drop in pressure causes these microscopic air bubbles to rapidly expand and release, creating a white, cloudy appearance that looks like soap or milk. You can confirm this is air and not a chemical contaminant or a leak by performing the "Glass Test." Fill a clear glass with the cloudy water and set it on a counter. If the cloudiness clears from the bottom up over the course of 30 to 60 seconds, it is definitively dissolved air. If the water remains cloudy or develops a sediment layer at the bottom, you may have a fractured membrane or a failing carbon post-filter. This is especially common after a system "prime" or when the storage tank has been completely drained and refilled. FIX To properly purge the air from your ROES-50 system and clear the cloudiness, follow this systematic flushing sequence: Open the RO faucet fully and allow the water to run for 3 to 5 continuous minutes. Do not use a glass; let it flow directly into the drain to ensure maximum velocity. Close the faucet and allow the storage tank to refill completely. You can monitor this by checking the pressure gauge on the tank (if installed) or waiting until the system stops producing waste water through the drain line. Repeat the flushing process: open the faucet and run the water until the flow slows down to a trickle. This forces the air pockets out of the membrane housing and the final polishing filter. Perform a "Tank Purge." Close the valve on top of the storage tank and run the faucet until the water stops flowing. Then, open the tank valve and run the water again. This creates a pressure differential that helps push trapped air through the lines. If you recently replaced the filters, repeat this cycle three times over a 24-hour period to ensure all microscopic bubbles are expelled from the filter media. IF THAT DIDN'T WORK Check for "Air Leaks" in the suction side. If you see constant, streaming bubbles rather than a cloudy mist, check the push-to-connect fittings on the pre-filter housings. If a fitting is slightly loose, it can suck air into the stream. Push the tubing firmly into the fitting or trim 1/4 inch off the end of the tubing with a square cut and re-insert it. Inspect the Post-Carbon Filter. If the cloudiness persists only after a new post-filter installation, the filter may have a manufacturing defect causing "fines" (carbon dust) to leak into the water. Replace the post-filter with a different unit to see if the clarity improves. Verify Tank Pressure. Use a tire pressure gauge on the storage tank's Schrader valve (located under the plastic cap). If the air pressure is too high (above 10-12 psi when empty), it can force excessive air into the water line. Discharge the excess air using a small bleed valve. Examine the Membrane Seal. If you recently replaced the RO membrane, ensure the O-rings are seated perfectly in the housing. A pinched O-ring can allow air or unfiltered water to bypass the membrane, causing turbulence and bubbling. HEADS UP Avoid using Teflon tape on the plastic threaded housings of the ROES-50; these rely on rubber O-rings for sealing. Tape can actually prevent a tight seal and introduce air leaks. Always sanitize your system with a diluted bleach solution or a commercial RO sanitizer when replacing the membrane to prevent biofilm buildup that can mimic cloudiness. Remember that the first two full tanks of water after any filter change should be discarded and not used for drinking to clear out carbon fines and preservatives. Check your source water pressure; if your home pressure is below 40 PSI, the ROES-50 may struggle to purge air efficiently, and you may need a permeate pump or booster pump.

Question 9

going on vacation, do i need to do anything with my apec reverse osmosis system?

Accepted Answer

DIAGNOSIS Leaving an APEC ROES-50 system unattended for extended periods introduces two primary risks: bacterial stagnation and mechanical failure due to thermal contraction. When water sits motionless in the membrane and storage tank for weeks, it can develop a "biofilm," where bacteria colonize the interior walls of the tank. This leads to a foul, sulfur-like smell upon your return and can permanently foul the TFC (Thin Film Composite) membrane, reducing its permeate flow rate. Furthermore, if your system is installed in an unheated garage, basement, or under-sink area prone to drafts during winter, the water trapped in the plastic housings and tubing can freeze. Because water expands when it freezes, the pressure can crack the high-impact polystyrene filter housings or rupture the 1/4" LLDPE tubing. Confirm if your installation area drops below 32°F (0°C) at any point during your absence to determine if a full drain is mandatory versus a simple shut-off. FIX Follow these precise steps to secure your ROES-50 system for a vacation lasting more than two weeks: Locate the feed water adapter valve (the small chrome valve where the 1/4" tubing connects to your cold water line). Turn the handle 90 degrees to the "Off" position to stop all incoming water. Open the RO faucet on your countertop and leave it open for 30 seconds to bleed off the residual line pressure. Close the RO faucet. If you are traveling during winter or to a cold climate, you must drain the storage tank. Open the RO faucet completely and let the tank empty until the stream stops. To ensure the membrane housing is empty, carefully unscrew the red-capped shut-off valve on top of the storage tank (if equipped) or use the drain valve on the bottom of the tank to remove any remaining pockets of water. Wipe down any condensation around the fittings to prevent mold growth while the system is dormant. IF THAT DIDN'T WORK If you return from vacation and encounter specific issues, use these targeted solutions: Stagnant Water Smell: If the first few gallons smell like "rotten eggs," do not drink them. Open the RO faucet and flush the entire storage tank two full times. If the smell persists, replace the GAC (Granular Activated Carbon) pre-filter and the RO membrane, as biofilm may have penetrated the membrane pores. Low Water Pressure: If the system is slow to refill, check the feed water adapter valve to ensure it is fully open. Air pockets may be trapped in the lines; run the faucet for 5 minutes continuously to purge all trapped air from the housings. Leaking Fittings: Temperature swings can cause the plastic "Quick Connect" fittings to shrink or shift. If you see a drip, push the tubing firmly back into the fitting or remove the tubing, trim 1/4 inch off the end with a sharp utility knife to ensure a square cut, and re-insert it. Clogged Membrane: If the tank takes more than 24 hours to refill after returning, the membrane may have dried out or fouled. Perform a "shock flush" by replacing the pre-filters and running the system for 48 hours without using the water. HEADS UP Never use heat guns or blowtorches to thaw a frozen ROES-50 system; the plastic housings will warp or melt, necessitating a full replacement of the filter canisters. Always replace your sediment and carbon pre-filters immediately upon returning from a long trip if the water sat for more than 30 days, as these filters can harbor bacteria. Check the air pressure in your storage tank using a tire gauge; it should be between 5-7 PSI when the tank is empty. Long periods of inactivity can sometimes reveal slow leaks in the tank's internal bladder. Avoid turning the feed water valve "on and off" rapidly, as this can cause water hammer, which may loosen the connections on the APEC manifold.

Question 10

the black drain line from my apec roes-50 keeps popping out of the saddle under the sink.

Accepted Answer

DIAGNOSIS The issue where the black 1/4" drain line pops out of the ROES-50 drain saddle is almost always caused by an incomplete seat within the quick-connect collet. In these push-to-connect fittings, a small metal gripping ring (the collet) must clamp down tightly on the outer diameter of the polyethylene tubing. If the tube is only inserted 1/8" or 1/4" of the way, it rests on the edge of the internal O-ring rather than passing through it, creating a weak connection that fails under the slight pressure fluctuations of the RO system's waste cycle. Furthermore, this often happens because the tubing end has become "mushroomed" or scarred from previous failed attempts to push it in. If the end of the tube is slanted or jagged, it cannot slide past the internal O-ring seal, preventing the gripping teeth from locking onto a secure section of the pipe. You can confirm this by pulling the tube out and checking if the end is flared or if there are deep gouges in the plastic; if the tube slides out with zero resistance, the collet is either damaged or the tube was never fully seated. FIX To permanently secure the drain line to the saddle, follow these precise steps to ensure a mechanical lock: Shut off the cold water supply valve to the RO system to prevent any accidental leaks while you are manipulating the lines. Depress the small circular collar (the collet) on the drain saddle and pull the black 1/4" tubing completely out. Use a sharp utility knife or a dedicated tubing cutter to make a perfectly square, 90-degree cut across the end of the black tubing. Do not use scissors, as they often crush the tube into an oval shape, which prevents a proper seal. Inspect the end of the tube to ensure it is smooth and circular. If there are any scratches or "mushrooming" from previous attempts, cut off an additional 1/2 inch of tubing. Push the tubing firmly and straight into the saddle port. You will feel an initial resistance as it hits the O-ring; you must apply a strong, steady force to push it past that seal. Continue pushing until the tubing bottoms out. For the ROES-50 saddle, the tube should be inserted approximately 3/4 of an inch deep. Gently pull back on the tubing with moderate force to verify it is locked. If it slides out, repeat the cutting process and re-insert. IF THAT DIDN'T WORK Replace the Drain Saddle: If the tubing is cut square and pushed in fully but still pops out, the internal metal gripping ring (collet) may have lost its tension or become deformed. Replace the saddle assembly entirely to ensure the locking mechanism is functional. Check for Kinks: Ensure the black tubing is not under extreme tension or pulling at a sharp angle. If the tube is stretched too tight across the under-sink area, the constant lateral tension will eventually pull the tube out of the fitting. Create a small loop of "slack" tubing near the saddle to neutralize this tension. Inspect for Debris: Use a flashlight to look inside the saddle port. If a small piece of plastic from a previous tube break is lodged inside, the new tube cannot seat deeply enough to be gripped by the collet. Use a thin needle or compressed air to clear the port. Verify Tubing Diameter: Ensure you are using genuine 1/4" LLDPE tubing. If a non-standard or thinner-walled tube was substituted during a previous repair, the collet will not have enough material to grip, causing the line to slip. HEADS UP Never use Teflon tape or pipe sealant on the outside of the tubing before inserting it into a quick-connect fitting; this increases the diameter and prevents the collet from gripping the plastic. Avoid bending the black drain line too sharply near the saddle; a bend radius of less than 2 inches can put outward pressure on the fitting, compromising the seal. Periodically check the drain saddle for "creep," where the tube slowly backs out over several months due to vibration from the water lines. Ensure the saddle is clamped tightly to the drain pipe; if the saddle itself is loose or wobbling, it will transmit that movement to the tubing and eventually shake the line loose.

Question 11

my apec ro water still tastes like tap water, not pure. what gives?

Accepted Answer

DIAGNOSIS When your APEC ROES-50 system continues to produce water that tastes like your municipal tap water, you are likely experiencing "breakthrough" or a failure in the osmotic barrier. In most cases, this is caused by the 5th-stage GAC (Granular Activated Carbon) polishing filter becoming saturated. This final in-line filter is designed to remove tastes and odors that may have developed while the water sat in the pressurized storage tank. If the water tastes "chlorinated" or "metallic," the carbon in this stage has likely reached its adsorption limit and can no longer scrub the water. However, if the taste is specifically "salty" or "mineral-heavy," the 4th-stage RO membrane (the heart of the system) has likely failed or developed a pinhole leak. This allows Total Dissolved Solids (TDS) to pass through the membrane into the storage tank. You can confirm this by using a TDS meter; if the reading of the RO water is more than 10-15% of your raw tap water reading, the membrane is spent. Another common cause is "cross-contamination" within the storage tank, where a ruptured internal bladder allows raw water to seep into the purified side. FIX Follow these steps to restore the purity of your water, starting with the most likely culprit: Replace the 5th Stage Polishing Filter: Locate the small, horizontal in-line carbon filter situated between the storage tank and the faucet. Turn the valve on top of the storage tank to the "off" position. Use a wrench to unscrew the plastic nuts on both ends of the filter. Replace it with a new APEC-compatible GAC polishing filter. Ensure the flow direction arrow on the filter points toward the faucet. Flush the Storage Tank: After replacing the polishing filter, open the RO faucet and let the entire tank drain. This removes any stagnant water that may have absorbed odors from the old filter. Allow the tank to refill completely (approximately 2-4 hours). Replace Pre-Filters (Stages 1-3): If it has been more than 6 months, replace the sediment filter (Stage 1) and the two carbon block filters (Stages 2 and 3). If these are clogged, they cannot protect the RO membrane from chlorine, which causes the membrane to degrade prematurely. Swap the RO Membrane (Stage 4): If the taste persists, remove the membrane housing cap. Pull the old membrane out of the center housing. Insert a new TF-50 (or equivalent) membrane, pushing it firmly into the socket until it seats. Tighten the cap and run the system for 2 hours before drinking to clear the preservative solution. IF THAT DIDN'T WORK Check the Auto Shut-Off Valve (ASOV): If the ASOV is malfunctioning, it can cause pressure fluctuations that force raw water past the membrane. If you hear a constant "hissing" or the system never stops producing waste water, the ASOV needs to be replaced. Sanitize the System: Bacteria or biofilm can grow inside the storage tank or the tubing, creating a "musty" or "swampy" taste. Use a food-grade sanitizing solution or a small amount of unscented bleach in the pre-filter housings, run the system, and flush it thoroughly. Inspect the Storage Tank Bladder: Tap the top and bottom of the tank. If the top is heavy with water and the bottom is filled with air, the internal diaphragm has ruptured. This allows raw water to contaminate the purified supply. You will need to replace the entire storage tank. Verify the Check Valve: Ensure the check valve on the RO membrane housing is functioning. If it leaks, purified water can flow backward, pulling contaminants back into the system. HEADS UP TDS Testing: Purchase a handheld TDS meter. Test your tap water and your RO water monthly. A sudden spike in the RO reading is the only definitive way to know your membrane has failed before you taste it. Avoid Over-Tightening: When replacing filters, do not over-tighten the plastic housings. This can crack the canisters or strip the threads, leading to slow leaks that cause mold growth around the unit. Flush After Maintenance: Always discard the first two full tanks of water after replacing any filter or the membrane to ensure all carbon fines and manufacturing residues are purged. Chlorine Warning: If your local water utility has increased chlorine or chloramine levels, your pre-filters will saturate faster. If you notice the taste returning sooner than 6 months, shorten your filter replacement cycle.

Question 12

one of the filter housings on my apec ro system is leaking from the bottom. how do i fix it?

Accepted Answer

DIAGNOSIS Leaks at the bottom of the APEC ROES-50 filter housings are typically caused by a failure in the mechanical seal between the canister and the head. This usually occurs because the O-ring (the black rubber gasket) has become pinched, displaced, or degraded over time. When the O-ring is not seated perfectly flat in its groove, water bypasses the seal and drips from the lowest point of the housing. Another common cause is "creep," where the plastic threads slightly loosen due to the vibration of water flow or temperature fluctuations in the room. If you notice the leak started after a filter change, it is likely that the housing was cross-threaded or not tightened sufficiently to compress the O-ring. You can confirm this by wiping the housing completely dry and using a paper towel to track the water; if the moisture originates from the seam where the plastic canister meets the top bracket, the seal is the culprit. FIX To resolve this leak, you must reset the seal and ensure the housing is torqued correctly. Follow these precise steps: Close the cold water supply valve (the brass adapter) to stop the flow of water into the system. Open the RO faucet to bleed off the remaining pressure from the lines. Place a shallow bucket or towel beneath the leaking stage to catch the remaining water inside the canister. Using the blue plastic housing wrench provided with the ROES-50, grip the canister firmly. Turn the housing counter-clockwise to unscrew it completely from the head. Remove the used filter cartridge and inspect the O-ring located in the groove at the top of the canister. If the O-ring is cracked, flattened, or twisted, replace it with a genuine APEC replacement gasket. Clean the O-ring groove using a damp cloth to remove any grit or sediment that could prevent a flush seal. Apply a very thin layer of food-grade silicone lubricant to the O-ring. Avoid petroleum jelly (Vaseline), as it can degrade the rubber over time. Carefully thread the housing back into the head by hand, turning clockwise. Ensure it enters smoothly; if you feel resistance immediately, stop and realign to avoid cross-threading. Once hand-tight, use the blue wrench to give the housing an additional 1/4 to 1/2 turn. Do not over-tighten, as this can warp the plastic or crack the head. Slowly open the supply valve and check for leaks. IF THAT DIDN'T WORK Check for Hairline Cracks: Inspect the plastic housing for "stress cracks," which are tiny vertical fractures often found near the bottom of the canister. If the plastic is cracked, no amount of tightening will fix the leak. You must replace the entire housing canister. Inspect the Head Gasket: If the leak persists, the issue may be a cracked housing head (the top bracket). Check for a hairline fracture in the plastic where the canisters screw in. If the head is cracked, the entire bracket assembly must be replaced to ensure the system remains pressurized. Verify O-Ring Seating: Some O-rings "jump" out of their track during installation. Unscrew the housing again and ensure the O-ring is seated perfectly flat in the circular groove and is not pinched or protruding. Check the Tubing Connection: Ensure the leak is actually coming from the housing seam and not from a loose Quick-Connect fitting on the top of the head. If the leak is from a fitting, push the tubing in further or replace the lock clip. HEADS UP Avoid Over-Tightening: Using a pipe wrench or excessive force on the blue wrench can crack the plastic housing. Hand-tight plus a small turn with the wrench is the industry standard. Lubrication is Key: Always use food-grade silicone grease on the O-rings during every filter change. This prevents the rubber from binding and ensures a watertight seal. Filter Change Cycle: Replace your pre-filters every 6 months. Clogged filters increase the internal pressure on the housings, which can lead to seal failure or leaks. Temperature Warning: Ensure the system is not installed in a location where it is exposed to freezing temperatures, as the plastic housings can crack when water freezes inside them.

Question 13

apec roes-50 water output is super slow, barely a trickle. filters are new.

Accepted Answer

DIAGNOSIS The ROES-50 is a non-powered system that relies entirely on osmotic pressure to push water through the semi-permeable membrane. If you are seeing a trickle despite new filters, the root cause is almost always a failure to maintain a minimum input pressure of 40 PSI. When pressure drops below this threshold, the water cannot overcome the osmotic pressure of the membrane, resulting in a negligible flow rate or a storage tank that refuses to fill. Another common culprit is an air lock in the system or a faulty automatic shut-off valve (ASO). If the ASO valve is stuck or malfunctioning, it may prematurely restrict the flow to the membrane. Furthermore, if you recently replaced the filters, "air binding" can occur where trapped air pockets in the filter housings create resistance that slows the flow to a crawl. You can confirm a pressure issue by checking the storage tank; if the tank is empty and the faucet is trickling, the system isn't producing water. If the tank is full but the faucet is still trickling, the issue is located between the tank and the faucet, likely a kinked 1/4" line or a clogged faucet aerator. FIX Follow these steps in precise order to restore full flow to your ROES-50 system: Verify Feed Valve Orientation: Locate the feed water adapter valve connected to your cold water line. Ensure the small lever handle is perfectly parallel to the tubing. If it is perpendicular, the valve is closed. Turn it 90 degrees to the open position. Inspect for Line Kinks: Trace the red feed line from the wall to the first filter housing, and the clear line from the storage tank to the faucet. Look for sharp 90-degree bends or "pinches" where the tubing may have been pushed against the cabinet wall. Straighten any kinks to ensure maximum lumen flow. Perform a System Prime: Since you have new filters, you must purge air. Close the tank valve (the valve on top of the storage tank). Open the RO faucet and let it run for 5-10 minutes. You will hear sputtering; this is normal. Once the water flow stabilizes (even if slow), close the faucet and open the tank valve. Check Tank Pressure: Use a low-pressure tire gauge on the Schrader valve located at the bottom or side of the storage tank. With the tank empty of water, the air pressure should be between 7 and 10 PSI. If it is 0 PSI, use a bicycle pump to add air in small increments. Flush the Membrane: If the system was sitting idle for weeks before you changed the filters, the membrane may have "dried out." Open the faucet and let the system run for 2 hours to rehydrate the membrane surface. IF THAT DIDN'T WORK Replace the Automatic Shut-Off (ASO) Valve: The ASO valve is the small square component where four tubes meet. If the internal diaphragm has failed, it can restrict water flow even when the tank is empty. Replace this part and check if the flow improves immediately. Test Incoming House Pressure: Install a temporary pressure gauge on your cold water line. If your home pressure is below 40 PSI (common in rural areas or upper floors of apartments), the ROES-50 will never function correctly. You will need to install a permeate pump or a booster pump to increase the pressure to 60 PSI. Inspect the Faucet Aerator: Unscrew the small nozzle at the tip of the RO faucet. Debris from the installation process or calcium buildup can clog the tiny holes in the aerator, making the flow seem slow even when the system is producing water perfectly. Check for "Cross-Threading" in Housings: Ensure the filter canisters are tightened securely but not over-tightened. If a gasket is pinched or skewed during the filter change, it can create a partial blockage that restricts the flow of water into the membrane. HEADS UP Avoid Over-Pressurizing: When adding air to the storage tank, never exceed 12 PSI while the tank is empty, or you risk rupturing the internal bladder. Filter Sequence Matters: Always ensure the sediment filter is the first stage and the carbon block is second. Reversing these will cause the membrane to clog with sediment almost instantly, leading to a permanent "trickle" state. Avoid Kinking Tubing: When pushing the system back into the under-sink cabinet, use plastic tubing supports or clips to prevent the lines from folding over themselves. Flush New Membranes: Always discard the first 2-3 gallons of water after a full filter replacement to remove carbon fines and preservative agents from the new membrane.

Question 14

my apec reverse osmosis system is making a humming noise, is that normal?

Accepted Answer

DIAGNOSIS A humming or vibrating noise in an APEC ROES-50 system is almost never a sign of mechanical failure, as the system is non-electric and contains no motors or pumps. Instead, this is a resonance issue caused by the high-pressure flow of wastewater. As the system rejects impurities, water is pushed through the black 1/4" drain tubing at a constant rate. If that tubing is loosely draped or touching a wooden cabinet wall, the high-frequency vibration of the water molecules and air pockets creates a "hum" that is amplified by the hollow space under your sink, acting like a sounding board. You can confirm this is the cause by performing a "touch test." While the system is humming (especially during the tank-filling phase), gently press your finger against the black drain line at various points along its path. If the noise stops or changes pitch when you apply pressure to a specific spot, you have identified the vibration point. This typically occurs where the tubing makes contact with the side of the cabinet or where it enters the drain saddle clamp on your waste pipe. FIX To eliminate the resonance, you must decouple the tubing from the cabinet surfaces and stabilize the line to dampen the vibrations. Follow these steps: Locate the black 1/4" drain line starting from the RO membrane housing and following it to the drain saddle (the plastic clamp attached to your sink drain pipe). Identify every point where the tubing is touching the cabinet wall, the bottom of the sink, or other plumbing pipes. Use adhesive-backed plastic cable clips or heavy-duty zip ties to secure the tubing. Do not pull the ties so tight that they pinch or kink the tube, as this will restrict wastewater flow and increase pressure on the membrane, potentially shortening its lifespan. Create a "buffer zone" by placing a small piece of adhesive foam weatherstripping or a rubber gasket between the tubing and the cabinet wall at the primary contact points. Check the drain saddle clamp. Ensure the screw is tight enough to hold the tubing firmly against the waste pipe, but not so tight that it crushes the plastic tubing. If the saddle is vibrating against the metal pipe, wrap a single layer of electrical tape around the pipe before tightening the saddle. IF THAT DIDN'T WORK If the humming persists after securing the lines, consider these alternative causes: Air Trapped in the Membrane: If the system was recently installed or a filter was changed, air pockets can cause erratic flow and humming. Open the RO faucet and let it run for 5-10 minutes. If the tank is empty, allow the system to fully recharge (usually 2-4 hours) to purge all air from the housings. Automatic Shut-Off Valve (ASO) Chattering: The ASO valve controls the flow of water to the membrane. If the valve is failing or partially clogged, it can "chatter" as it tries to close, creating a rapid humming sound. This is common after 3-5 years of use. Replace the ASO valve (Part #APEC-ASO) to restore silent operation. Water Hammer Effect: If the hum occurs specifically when the system stops producing water, it may be a water hammer issue in your home's main plumbing. Installing a small water hammer arrestor on the cold water feed line leading into the RO system will absorb the pressure shock. High Feed Water Pressure: If your home's incoming water pressure exceeds 80 PSI, the flow through the ROES-50 can become turbulent. Install a pressure-reducing valve on your main line to bring the pressure down to the recommended 40-60 PSI range. HEADS UP Never kink the black drain line to stop the noise; restricting the waste flow will cause minerals to build up rapidly on the membrane, ruining the system. Check your drain saddle every six months. The plastic can degrade or loosen, which may lead to leaks or a return of the vibration noise. When replacing filters, always ensure the O-rings are lubricated with a food-grade silicone grease to prevent air leaks that contribute to noise. If you notice the humming is accompanied by a slow leak at the fittings, use a small piece of Teflon tape on the threaded connections, but never on the quick-connect push-fittings.

Question 15

my apec roes-50 ro system has no water coming out of the faucet at all, what's wrong?

Accepted Answer

DIAGNOSIS When an APEC ROES-50 system produces zero output at the faucet, the issue is almost always a total loss of pressure within the system, preventing water from being pushed through the final stage and out of the dedicated faucet. This typically happens because the feed water supply has been accidentally closed, the internal storage tank has lost its air charge (pressure), or there is a catastrophic blockage in the 1/4" LLDPE tubing. To confirm the root cause, check the pressure gauge if your model is equipped with one, or perform a "tank bypass test." Close the blue tank valve (the handle on top of the storage tank). If water still trickles out of the faucet, the RO membrane is working, but the tank is empty or failed. If there is absolutely no flow with the tank valve closed, the problem is upstream—either the feed water valve is shut, the pre-filters are completely clogged with sediment, or the Auto Shut-Off Valve (ASO) has malfunctioned and is permanently closing the line. FIX Follow these steps in precise order to restore water flow to your APEC ROES-50 faucet: Verify the Feed Water Adapter: Locate the brass adapter connected to your cold water pipe. Ensure the small lever handle is positioned parallel to the tubing (vertical/open). If the handle is perpendicular to the tubing, the water supply is cut off. Inspect the Main Cold Water Supply: Ensure the shut-off valve for the entire sink area is fully open. If your kitchen faucet works, this step is confirmed. Check the Storage Tank Valve: Locate the blue plastic valve on top of the pressurized storage tank. Ensure the handle is in the "Open" position (parallel to the tubing). If this valve is closed, no water can exit the tank to the faucet. Test the Storage Tank Pressure: If the tank feels heavy (full of water) but nothing comes out of the faucet, the internal bladder has lost its air charge. Use a standard tire pressure gauge on the Schrader valve (usually located on the side or bottom of the tank under a plastic cap). The pressure should be 5-7 PSI when the tank is empty. Clear Air Locks: If you recently changed filters, air may be trapped. Open the RO faucet and let it sit for 10 minutes. If no water flows, briefly open the bleed valve on the membrane housing (if applicable) to force air out of the system. IF THAT DIDN'T WORK Replace the Pre-Filters: If the sediment and carbon blocks (the first three canisters) are completely saturated or clogged with scale, water cannot reach the membrane. Replace the 5-micron sediment filter and the two GAC carbon filters. If the filters are blackened or slimy, they were the bottleneck. Check for Kinked Tubing: Inspect the 1/4" red, yellow, and blue tubing. A single sharp kink in the line leading to the faucet or from the tank can completely block flow. Straighten any bends or cut and re-insert the tubing into the push-fit connectors. Test the Auto Shut-Off (ASO) Valve: The ASO valve is the square block where four tubes meet. If the internal diaphragm fails, it may shut off the water flow even when the tank is empty. Disconnect the feed water line from the ASO valve; if water flows from the feed line but not through the ASO, the valve is defective and must be replaced. Check the RO Membrane: If the system is making a constant "hissing" sound (waste water running) but the tank never fills, the membrane (the large center canister) may be fouled or ruptured. Replace the membrane element (typically a Dow Filmtec or APEC equivalent). HEADS UP Air Pressure Maintenance: Always check the tank air pressure when replacing the membrane; a tank with 0 PSI will not push water to the faucet even if it is full. Sanitization: If the system was dry for more than a week, flush the system by filling the tank and draining it completely two times before drinking the water to remove stagnant air and biofilm. Leak Detection: After fixing a blockage, run the system for 30 minutes and wipe all push-fit connections with a dry paper towel to check for "weeping" leaks. Filter Schedule: To prevent total flow failure, replace the three pre-filters every 6 months and the membrane every 24 months.

Question 16

red light is on my apec ro faucet. what does that mean?

Accepted Answer

DIAGNOSIS The red light on your APEC ROES-50 faucet is triggered by a built-in electronic timer, not a sensor that measures actual water purity or pressure. This is a "preventative maintenance" indicator designed to alert you that the pre-filters (Stages 1, 2, and 3) have likely reached the end of their effective lifespan. Because the system cannot "see" how dirty the filters are, it simply counts down the days from the date of installation. When the timer expires, the LED transitions from green (or blue) to red to signal that the sediment and carbon filters are potentially saturated. If you ignore this light, the pre-filters can become clogged, which increases the pressure on the RO membrane (Stage 4), potentially leading to a premature membrane failure or a significant drop in the daily gallon output of your system. You can confirm this is a timer issue if your water taste hasn't changed but the light suddenly switched colors after approximately 6 months of use. FIX To resolve the red light and maintain your water quality, you must replace the pre-filter cartridges and manually reset the electronic timer. Follow these precise steps: Shut off the cold water supply valve leading to the ROES-50 system. Close the valve on top of the storage tank to prevent pressure backflow. Use the provided plastic wrench to unscrew the three pre-filter housings. Replace the Stage 1 (5-micron sediment), Stage 2 (carbon block), and Stage 3 (carbon block) filters. Ensure the O-rings are lubricated with a small amount of food-grade silicone grease to prevent leaks. Tighten the housings firmly, but do not over-tighten, as this can crack the plastic sumps. Slowly open the water supply and the tank valve. Run the faucet for 5-10 minutes to flush out any carbon fines (black dust). To reset the light: Locate the reset button. On most ROES-50 faucet models, this is a small pinhole or a button located on the underside of the faucet base or integrated into the LED module. Using a paperclip or a small tool, press and hold the reset button for exactly 10 seconds. Release the button. The light should flash and return to green or blue, indicating the timer has been reset for another 6-month cycle. IF THAT DIDN'T WORK Battery Replacement: If the light does not change color after holding the reset button, the internal coin-cell battery (usually a CR2032 or similar) may have died. You will need to unscrew the faucet assembly from the sink deck to access the battery compartment in the base of the faucet. Reset Sequence Timing: Some versions of the APEC faucet require a "double-tap" or a specific sequence. Try pressing the reset button three times rapidly, then holding it on the third press for 10 seconds. Electrical Short: If the light is flickering or staying red despite a reset, check the wiring connection between the faucet and the sensor lead. Ensure no water has leaked into the electronic module, which can cause a short circuit. Filter Bypass: If you have installed a high-capacity filter set that lasts longer than 6 months, the light will still turn red. In this case, simply manually reset the timer and ignore the light until your specific filter schedule is reached. HEADS UP Membrane Life: Remember that the red light only tracks pre-filters. The RO membrane (Stage 4) typically lasts 2-3 years. Replace it only when you notice a significant drop in water production or a rise in TDS (Total Dissolved Solids) readings. Air Pockets: After replacing filters, you will hear air sputtering from the faucet. This is normal. Run the system for several gallons to fully purge air from the lines. O-Ring Care: Never reuse old O-rings if they appear flattened or cracked. A leaking pre-filter housing can cause water damage inside your cabinetry. TDS Testing: Do not rely solely on the red light. Use a handheld TDS meter once a month to verify the actual performance of the membrane.

Question 17

installing my apec ro system, what's the deal with the drain saddle? do i have to drill a hole in my pipe?

Accepted Answer

DIAGNOSIS The APEC ROES-50 system utilizes a "drain saddle" clamp specifically designed to create a leak-proof connection to your waste line without requiring you to manually drill a hole using a power tool. The saddle contains a built-in, sharp metal piercing valve (a needle) that is driven through the pipe wall as you tighten the clamp. This creates a precise aperture for the RO reject water to enter the waste stream. The most common point of confusion is whether you need to pre-drill a hole. If you do, you risk cracking the pipe or stripping the threads of the saddle. The "deal" with the saddle is that it converts a standard PVC or metal drain pipe into a junction point. You can confirm the installation is correct if the saddle is seated flush against the rubber gasket and the piercing needle has fully penetrated the pipe wall without distorting the pipe's circular shape. Failure to seat the gasket correctly will result in a slow drip that often goes unnoticed until the cabinet floor is warped. FIX Follow these precise steps to install the drain saddle on your ROES-50 system: Identify the Installation Point: Locate the vertical waste pipe (tailpiece) coming down from your sink strainer. You must install the saddle above the P-trap (the U-shaped bend) but below the sink bowl. If you install it below the P-trap, you risk sewage backing up into your RO membrane. Prepare the Surface: Wipe the pipe clean of any grease or slime. Slide the black rubber gasket (included in the ROES-50 kit) onto the pipe. Ensure it is centered and lying flat against the pipe wall. Position the Saddle: Place the plastic saddle clamp over the gasket. Ensure the outlet port (where the plastic tubing connects) is facing downward to prevent air locks. Tighten the Bolts: Using a screwdriver, tighten the two bolts on the saddle. Do this in an alternating pattern (tighten the left bolt a bit, then the right) to ensure the saddle descends evenly. Continue tightening until the piercing needle has fully penetrated the pipe and the saddle is clamped firmly against the gasket. Stop immediately once the saddle is snug; over-tightening can crack PVC pipes. Connect the Tubing: Insert the black 1/4" RO waste line tubing into the saddle's outlet port. Push it in firmly until it seats. If the saddle uses a locking nut, tighten it securely to ensure the tube cannot be pulled out by the weight of the water. IF THAT DIDN'T WORK The Pipe is Too Large: If your drain pipe is larger than the standard 1.5-inch diameter, the saddle will not clamp securely. In this case, you must purchase a dedicated RO drain adapter or a larger diameter saddle clamp compatible with 2-inch piping. The Pipe is Metal: While the ROES-50 saddle works on some thin-walled metal pipes, it may struggle with heavy-gauge cast iron or thick copper. If the needle won't penetrate, do not force it. Instead, install a "T-fitting" drain adapter that replaces a section of the pipe entirely. Leaking at the Gasket: If you see water dripping from the saddle, loosen the bolts and check the gasket. Often, the gasket slips or bunches up during tightening. Re-center the gasket, apply a small amount of silicone sealant to the outer edge of the rubber, and re-tighten. Clogged Waste Line: If the RO system is not producing water and the waste line is dry, the piercing needle may have pushed a piece of plastic debris into the hole, blocking the flow. Remove the saddle, clear the hole with a small nail, and reinstall. HEADS UP Avoid Over-tightening: PVC pipes become brittle over time. If you tighten the saddle bolts too far, the pipe can snap, requiring a full replacement of the sink plumbing. Check for "Siphon" Effects: Ensure the waste line does not have a high loop after the saddle; the water should flow downward via gravity toward the main sewer line. Periodic Inspection: Every six months, check the saddle area for "sweating" or mineral buildup, which indicates a slow leak that could damage your cabinetry. Compatibility Warning: Never install the drain saddle on a dishwasher drain hose (the corrugated flexible tubing). The saddle is designed only for rigid PVC or metal pipes.

Question 18

the storage tank on my apec roes-50 feels empty or only gives a couple cups of water. how do i fix it?

Accepted Answer

DIAGNOSIS The ROES-50 utilizes a pressurized bladder tank to store purified water. Inside the steel shell, a rubber diaphragm separates the purified water from a pocket of compressed air. This air pressure is what physically pushes the water out of the tank and up through your faucet. When the tank feels heavy (indicating it is full of water) but only delivers a small amount of water before the flow stops, the tank is "waterlogged." This happens because the air charge in the bladder has leaked out over time or the bladder has lost its elasticity. Without the 7-8 PSI of pre-charge pressure, the water has no motive force to leave the tank. You can confirm this by lifting the tank; if it feels significantly heavier than usual but the faucet only gives a trickle, the air pressure is gone. If you press the Schrader valve (the air intake) and water squirts out instead of air, the internal bladder has ruptured completely. FIX To restore the pressure in your APEC ROES-50 storage tank, follow these exact steps to avoid damaging the bladder: Close the cold water supply valve to the RO system and close the tank ball valve (the blue or white handle located on top of the tank). Open the RO faucet on your sink and leave it open. This releases the remaining pressure in the lines. Locate the air valve (Schrader valve) on the bottom or side of the tank, usually protected by a plastic cap. Use a standard low-pressure tire gauge to check the current PSI. If the tank is full of water, the reading will be inaccurate; you must drain the tank first. Slowly open the tank valve and allow the RO faucet to run until the water stops flowing completely. The tank is now empty of water, allowing you to measure the "pre-charge" air pressure accurately. Using a bicycle pump or a portable air compressor, pump air into the valve. Check the gauge frequently. You must reach exactly 7 to 8 PSI. Do not exceed 10 PSI, as over-pressurizing can collapse the bladder or prevent the RO membrane from filling the tank. Once 7-8 PSI is reached, replace the valve cap and reopen the tank ball valve and the main water supply. Allow the system to refill (this may take 2-4 hours) and test the flow at the faucet. IF THAT DIDN'T WORK Ruptured Bladder: If you pump air into the valve and hear a hissing sound, or if water emerges from the air valve, the internal rubber diaphragm has a hole. There is no way to patch a bladder; you must replace the tank. For the ROES-50, ensure you buy a replacement tank with the same gallon capacity (typically 2.0 to 3.2 gallons) to maintain system balance. Clogged Tank Valve: If the tank is pressurized and full, but water won't flow, the tank ball valve may be stuck or clogged with sediment. Remove the valve and check for debris, or replace the valve entirely. Faultile Auto-Shutoff Valve (ASO): If the tank never fills up in the first place, the ASO valve (the square plastic component on the manifold) may be stuck in the "closed" position, preventing water from ever reaching the tank. Membrane Failure: If the system is producing water so slowly that the tank never actually fills, your RO membrane (the main filter) may be fouled. Check the TDS (Total Dissolved Solids) of the water; if it is nearly the same as your tap water, the membrane is spent and must be replaced. HEADS UP Pressure Balance: Never inflate the tank while it is full of water. The water pressure will give you a false high reading on your gauge, and you will under-inflate the bladder, leading to the same "waterlogged" problem within weeks. Valve Leakage: Check the Schrader valve for slow leaks after inflating. A small dab of silicone grease on the valve pin can help create a better seal. Seasonal Changes: Extreme temperature drops in unheated basements can cause air pressure to drop. It is a good practice to check the tank PSI once a year. Flow Rate: Remember that the ROES-50 is a slow-filtration system. If you have a leak in your drain line or a faulty check valve, the tank may never reach full pressure even if the air charge is correct.

Question 19

my apec ro water tastes weird or salty after a few months. is the membrane bad?

Accepted Answer

DIAGNOSIS A salty, metallic, or "off" taste in an APEC ROES-50 system after a few months usually indicates "membrane breakthrough" or "TDS creep." In a healthy system, the semi-permeable membrane rejects up to 98% of dissolved salts and minerals. However, if the membrane has developed microscopic tears or has become fouled by chlorine (which eats through the polyamide layer), dissolved solids leak through into the product water. This is often caused by the first two pre-filters (sediment and carbon) becoming saturated, allowing chlorine to reach and degrade the membrane. Another common cause is a failure in the Automatic Shut-Off Valve (ASO) or a leaking check valve. If the system doesn't shut off completely, "cross-contamination" occurs where concentrated brine water from the waste line seeps back into the reserve tank or the product line. You can confirm this by using a TDS (Total Dissolved Solids) meter. Measure the tap water, then measure the RO water. If the RO water is more than 10-15% of the tap water's TDS value, the membrane is failing. If the taste only occurs after the system has sat idle overnight, the issue is likely a faulty check valve causing brine migration. FIX To resolve the taste issue and restore water purity, follow these steps to replace the filtration stack and the membrane: Shut off the cold water supply valve and close the ball valve on top of the storage tank. Open the RO faucet to release all internal pressure. Use the provided housing wrench to unscrew the three pre-filter canisters. Discard the sediment filter and the two GAC (Granular Activated Carbon) filters. Clean the inside of the housings with mild soap and water. Unscrew the membrane housing cap (the horizontal tube). Carefully pull out the old RO membrane. If it feels slimy or looks discolored, it was fouled. Insert a new APEC-compatible 50 GPD (Gallons Per Day) membrane. Push it firmly until it seats fully into the housing; you should feel it "click" or lock into place to ensure a tight seal. Install new pre-filters. Ensure the sediment filter is in the first stage, followed by the carbon filters. Tighten the housings hand-tight, then give them a quarter-turn with the wrench. Replace the final polishing filter (the small inline carbon filter) if it has been in use for more than 6-12 months, as this removes the "stale" taste from the storage tank. Slowly open the water supply and check for leaks. Flush the system by filling and draining the storage tank twice before drinking. IF THAT DIDN'T WORK Replace the Check Valve: If the taste returns after the system sits idle, the one-way check valve (usually a small elbow fitting where the membrane housing meets the tubing) is leaking. This allows salty brine to flow backward into your pure water line. Replace the check valve with a new elbow fitting to ensure a one-way flow. Inspect the ASO Valve: If you hear the system constantly running (water flowing to the drain) even when the tank is full, the Automatic Shut-Off Valve is faulty. This prevents the membrane from resting and can lead to premature degradation and taste issues. Replace the ASO valve. Sanitize the System: If the taste is "musty" rather than salty, bacteria may have colonized the storage tank. Drain the tank and use a food-grade sanitizing solution or a small amount of unscented bleach in the pre-filter housings to flush the system. Check for Air Leaks: Inspect the tubing connections for tiny pinhole leaks. If air is being sucked into the system, it can alter the pressure dynamics and cause the membrane to operate inefficiently, allowing more TDS to pass through. HEADS UP Pre-Filter Priority: Never skip the carbon pre-filter changes. The membrane is extremely sensitive to chlorine; if the carbon filters fail, the membrane will be destroyed in a matter of weeks. TDS Monitoring: Buy a digital TDS meter. Testing your water every 3 months is the only way to know if the membrane is failing before you actually taste the salt. Tank Pressure: Check the air pressure in the storage tank with a tire gauge. It should be 7-10 PSI when empty. If it is too high, the system may not fill properly, leading to "stagnant" water tastes. Avoid Kinking: Ensure the 1/4" poly tubing is not kinked or pinched behind the cabinetry, as this restricts flow and can cause pressure spikes that damage the membrane.

Question 20

apec roes-50 won't shut off, keeps running and dumping water down the drain. help?

Accepted Answer

DIAGNOSIS The APEC ROES-50 utilizes an Automatic Shut-Off (ASO) valve that relies on a pressure differential to stop the flow of water. When the storage tank reaches approximately 60-70% of the incoming line pressure, the ASO valve closes the feed water inlet, stopping the production process. If your system is constantly dumping water down the drain, it means the ASO valve is never receiving the signal to close, causing the membrane to continuously process water and send the brine (waste) down the drain indefinitely. This failure typically stems from one of two root causes. First, the diaphragm in the pressurized storage tank may have ruptured or lost its air charge. If the tank cannot build back-pressure, the ASO valve stays open forever. Second, the ASO valve itself—a small mechanical component located in the manifold head—may have a failed internal diaphragm or a clog, preventing it from sealing even when the tank is full. You can confirm a tank issue by lifting the tank; if it feels extremely heavy (waterlogged) but only a trickle of water comes out of the faucet, the air bladder has failed. FIX To resolve a continuous drain issue, you must first determine if the tank is the culprit before replacing the valve. Follow these precise steps: Test the Tank Pressure: Close the cold water feed valve. Open the RO faucet and let all the water drain out. Once the flow stops, lift the storage tank. If it is heavy, it is waterlogged. Re-pressurize the Tank: Use a standard tire pressure gauge on the air valve (Schrader valve) located on the bottom or side of the tank. With the tank empty of water, the pressure should be between 7 and 10 PSI. If it is lower, use a bicycle pump or compressor to add air in short bursts until you hit 8 PSI. Verify the ASO Valve: If the tank is properly pressurized but the system still won't shut off, you must inspect the ASO valve. This is the square-shaped component where the feed water enters the manifold. Flush the Valve: Sometimes debris traps the valve open. Briefly close the feed water valve and open the RO faucet to create a vacuum, then snap the feed water valve open quickly to try and "shock" the diaphragm into place. Replace the ASO Valve: If the issue persists, unscrew the ASO valve from the manifold using a crescent wrench. Install a replacement ASO valve, ensuring the O-rings are lubricated with food-grade silicone grease to prevent leaks. IF THAT DIDN'T WORK Check for a Clogged Membrane: If the RO membrane is completely fouled or scaled, it cannot produce enough purified water to fill the tank and create back-pressure. If you haven't changed your membrane (the large center housing) in 2-3 years, replace it immediately. A failed membrane will cause the system to run indefinitely because the "full" pressure threshold is never reached. Inspect the Check Valve: There is a small one-way check valve located at the exit of the membrane housing. If this valve leaks, water from the storage tank flows backward through the membrane and out the drain, tricking the ASO valve into thinking the tank is empty. Replace the check valve if you notice the system starts draining again shortly after the tank is filled. Test Incoming Water Pressure: If your home's incoming water pressure is too low (below 40 PSI), the system may struggle to reach the shut-off threshold. Install a permeate pump or a booster pump to increase the pressure entering the membrane. Examine the Drain Line: Ensure the black drain line is not kinked or restricted. While a restriction usually slows the flow, an extreme blockage can sometimes cause erratic pressure readings within the manifold, preventing a clean shut-off. HEADS UP Air Pressure Warning: Never add air to the storage tank while it is full of water; you must drain the water first, or you will get an inaccurate PSI reading and potentially damage the bladder. Filter Schedule: Replace your Stage 1, 2, and 3 sediment and carbon filters every 6-12 months. Clogged pre-filters reduce the pressure reaching the ASO valve, which can lead to longer run times and wasted water. Leak Check: After replacing the ASO valve or adjusting the tank, wipe all connections with a dry paper towel. Even a tiny "weeping" leak at the manifold can prevent the system from reaching the pressure required to shut off. Tank Positioning: Always keep the storage tank upright. Laying it on its side can cause the internal bladder to shift, leading to premature failure and waterlogging.

Question 21

just got my ROES-50, one of the plastic filter housings has a small crack from shipping. can i still install it?

Accepted Answer

DIAGNOSIS The APEC ROES-50 utilizes high-pressure reinforced polypropylene housings designed to withstand significant hydraulic stress. Even a hairline fracture—often caused by impact during shipping or over-tightening during factory quality checks—compromises the structural integrity of the vessel. Because the ROES-50 operates on a pressure differential to force water through the semi-permeable membrane, the housings are under constant tension. A small crack may seem insignificant when the system is dry, but once the cold water supply line is opened, the internal pressure (typically between 40 and 100 PSI) will force water through the fissure. Because the plastic is rigid, these cracks tend to propagate or "spiderweb" under the stress of temperature fluctuations and pressure surges. This leads to a catastrophic failure known as a "burst housing," where the plastic snaps completely, potentially flooding your cabinetry and flooring in seconds. You can confirm the severity by inspecting the crack with a bright LED flashlight; if the crack penetrates the wall of the housing or is located near the threaded top-neck, the unit is fundamentally unsafe for use. FIX You must replace the damaged housing before any water is introduced to the system. Do not attempt to seal the crack with epoxy, silicone, or waterproof tape, as these adhesives cannot withstand the constant pressure of a potable water system and will eventually peel away. Identify the specific stage: Determine which housing is cracked. The ROES-50 has three pre-filter housings (Sediment, Carbon Block, and GAC) and one membrane housing. Note whether it is a standard 10-inch housing or the specialized membrane vessel. Document the damage: Take clear, high-resolution photos of the crack and the shipping box. Capture the serial number located on the system frame or the packaging to expedite the warranty claim. Contact APEC Support: Reach out to APEC Water Systems or your authorized vendor. Request a replacement "10-inch High-Pressure Polypropylene Housing" (or the specific membrane housing if that is the damaged part). Verify the O-Ring: When the replacement housing arrives, ensure it includes a new EPDM O-ring. If the original O-ring was contaminated with debris during the shipping damage, it must be replaced to ensure a watertight seal. Install the new housing: Thread the new housing into the manifold by hand to avoid cross-threading. Once finger-tight, use the provided housing wrench to turn it an additional 1/4 turn. Do not over-tighten, as this is the primary cause of new cracks. IF THAT DIDN'T WORK Purchase a Generic 10" Housing: If the vendor is slow to respond and you need water immediately, the ROES-50 uses industry-standard 10-inch housings. You can purchase a high-quality replacement housing from a local plumbing supply store, provided it matches the port size (typically 1/4" or 3/8") and the thread pitch of the APEC manifold. Full System Exchange: If you discover multiple hairline fractures across different housings, it indicates a "rough transit" event. In this case, request a full system replacement rather than individual parts, as the stress of shipping may have compromised the plastic seals in the RO membrane head as well. Inspect the Manifold: If the crack is located exactly where the housing screws into the top manifold, check the manifold threads for stripping. If the manifold itself is cracked, replacing the housing will not fix the leak; you will need a replacement top-bracket assembly. HEADS UP Avoid Chemical Sealants: Never use PVC glue or industrial adhesives on the interior of the housing. These chemicals can leach into your drinking water and are not food-grade certified (NSF/ANSI 61). The "Wrench Rule": Always use the specific plastic spanner wrench provided with the ROES-50. Using a pipe wrench or pliers can distort the circular shape of the housing, creating new stress points that lead to cracks. Check for "Shipping Shakes": Before installing the replacement, gently shake the other housings. If you hear any rattling or see white "stress marks" (discoloration in the plastic), those housings are also compromised and should be replaced. Pressure Testing: Once the replacement is installed, open the water supply valve slowly. Leave a dry paper towel wrapped around the housing for 24 hours to detect "weeping" leaks that aren't immediately visible.

Question 22

my APEC reverse osmosis system is making a constant dripping or dribbling sound from the drain line. is that normal?

Accepted Answer

DIAGNOSIS The APEC ROES-50 utilizes a process where a significant amount of "brine" or wastewater is pushed through the membrane to flush out contaminants. If you hear a periodic, slow trickle or a rhythmic dripping sound while the system is actively producing water (i.e., when the storage tank is empty or being depleted), this is perfectly normal operation. The system is designed to continuously discharge waste water into the drain line during the filtration cycle to prevent the RO membrane from fouling. However, if the dripping or flowing sound is constant and never stops—even after the storage tank has been completely filled and the faucet is closed—you have a failure in the automatic shut-off mechanism. This usually occurs because the Automatic Shut-Off Valve (ASOV) is not receiving enough back-pressure from the storage tank to trigger the internal diaphragm to close the feed water. This results in the system "running away," where water flows continuously through the membrane and out the drain, wasting gallons of water and prematurely wearing out your pre-filters and membrane. FIX To stop a continuous leak from the drain line, you must ensure the system can reach the required shut-off pressure. Follow these steps to diagnose and resolve the issue: Verify Tank Pressure: Turn off the incoming water supply valve and close the tank valve. Open the RO faucet to bleed off all remaining pressure. Use a tire pressure gauge on the air valve (Schrader valve) located at the bottom or side of the storage tank. The pressure should be between 5 and 7 PSI when the tank is empty. If it is lower, use a bicycle pump to add air until it hits 7 PSI. Check Incoming Water Pressure: Ensure your home's water pressure is at least 40 PSI. If you have a pressure regulator on your main line that is set too low, the ASOV will never trigger. If pressure is below 40 PSI, you will need to install a permeate pump or a booster pump to force water through the membrane. Test the ASOV Valve: Locate the ASOV (the small square plastic valve where four tubes connect). While the system is running, slowly close the tank valve. If the flow to the drain stops immediately, the valve is working, and the issue is likely a faulty tank bladder. If the flow continues even with the tank valve closed and the faucet shut, the ASOV diaphragm is likely ruptured. Replace the ASOV: If the valve is faulty, disconnect the four 1/4" polyethylene tubes. Install a new ASOV (Part #APEC-ASOV) ensuring the tubes are pushed firmly into the fittings to avoid leaks. IF THAT DIDN'T WORK Check the Check Valve: There is a small one-way check valve located at the exit of the RO membrane housing. If this valve fails or gets stuck open, water will leak back from the tank through the membrane and out the drain line. Replace the check valve if you notice the system "cycling" (starting and stopping) every few minutes. Inspect the Flow Restrictor: If the dripping is excessive but not constant, the flow restrictor (the small plastic plug in the drain line) may be clogged or cracked. A faulty restrictor alters the pressure balance, preventing the ASOV from closing. Replace the 300cc or 400cc restrictor depending on your specific ROES-50 model variant. Examine the Membrane Seal: If the RO membrane is not seated correctly in the housing, water can bypass the membrane and flow directly into the drain line without creating the back-pressure needed to shut the system off. Open the membrane housing, remove the membrane, and re-seat it firmly, ensuring the O-rings are lubricated with food-grade silicone grease. HEADS UP Air Traps: After replacing filters or the ASOV, you may hear "gurgling" sounds. This is normal air trapped in the lines; run the system for 2-3 full tank cycles to clear it. Filter Change Schedule: Always replace the three pre-filters every 6 months. Clogged pre-filters drop the incoming pressure, which can mimic a faulty ASOV by preventing the system from reaching shut-off pressure. Leak Detection: Check the fittings around the ASOV and the drain saddle clamp every few months. The constant vibration of the waste line can occasionally loosen the saddle clamp on your waste pipe.

Question 23

what's the actual filter change schedule for the ROES-50? i don't want to guess.

Accepted Answer

DIAGNOSIS The APEC Water Systems ROES-50 is a multi-stage filtration system where each stage serves as a sacrificial barrier for the next. The root cause of system failure—specifically slow flow rates or "briny" tasting water—is almost always the saturation of the pre-filters. When the Stage 1 sediment filter and Stage 2 carbon block become clogged with particulates and chlorine, the water pressure reaching the RO membrane drops significantly. This forces the membrane to work harder, leading to premature fouling and a drastic increase in wastewater production. To confirm if your filters are exhausted, monitor the fill rate of your storage tank. If the tank takes significantly longer to refill than it did upon installation, or if you notice a "chalky" taste in the water, the membrane is likely compromised. You can verify the membrane's health using a Total Dissolved Solids (TDS) meter; if the permeate water (the filtered water) shows a TDS reading that is less than 90% lower than the source water, the membrane has reached the end of its life cycle. FIX To maintain peak performance and ensure the longevity of the expensive RO membrane, follow this precise maintenance schedule: Stages 1, 2, and 3 (Pre-filters): Replace every 6 months. This includes the 5-micron sediment filter, the carbon block filter, and the second carbon block. Use a filter wrench to unscrew the three translucent housings. Ensure the O-rings are lubricated with a food-grade silicone grease before tightening to prevent leaks. Stage 4 (RO Membrane): Replace every 24 to 36 months. To replace the membrane, push the blue locking clip on the membrane housing cap and twist it counter-clockwise. Pull the old membrane out and slide the new one in firmly until it seats fully. If you notice a drop in water pressure from the faucet, replace this sooner. Stage 5 (Post-Carbon GAC Filter): Replace every 12 months. This is the final polishing filter located horizontally above the tank. Use a 7/16" wrench to loosen the fittings, remove the old cartridge, and snap the new one in. Sanitization: Every time you change the pre-filters, rinse the inside of the housings with a mild bleach solution or a dedicated system sanitizer to prevent biofilm buildup. IF THAT DIDN'T WORK Check the Storage Tank Pressure: If water flow is slow despite new filters, your bladder tank may have lost its air charge. Use a tire pressure gauge on the Schrader valve at the bottom of the tank. It should be between 5 and 7 PSI when the tank is empty of water. Use a bicycle pump to add air if it is below this range. Inspect the Auto Shut-Off Valve (ASOV): If the system continues to run water into the drain even when the tank is full, the ASOV is likely stuck. Gently tap the valve with a plastic mallet or replace the valve entirely to stop water waste. Verify Source Water Pressure: RO systems require a minimum of 40 PSI to function correctly. If your home pressure has dropped or you are using a gravity-fed system, you will need to install a permeate pump or a booster pump to force water through the membrane. Flush the Membrane: If you have just replaced the membrane and the water tastes strange, run the system for 2 full tank refills before drinking. This clears the preservative solution from the membrane material. HEADS UP Avoid Over-tightening: When reinstalling the filter housings, tighten them hand-tight plus a quarter turn with the wrench. Over-tightening can crack the plastic housing or deform the O-ring, leading to persistent leaks. Check for Leaks: After any filter change, leave a dry paper towel under each fitting for 24 hours. Even a microscopic drip can cause significant cabinet damage over time. Water Quality Variance: If your source water is exceptionally "hard" (high calcium/magnesium), you may need to replace the pre-filters every 3-4 months to prevent the RO membrane from scaling. Genuine Parts: Always use APEC-certified replacement cartridges. Generic filters often have different micron ratings or inferior carbon density, which can allow chlorine to reach and permanently damage the RO membrane.

Question 24

installing my APEC ROES-50, do i need any special tools? the manual list is confusing.

Accepted Answer

DIAGNOSIS The installation of the APEC ROES-50 involves intersecting three different systems: your cold water supply line, your sink countertop, and your wastewater drain pipe. The confusion regarding tools usually stems from the fact that different installation paths (Standard vs. Air-Gap faucets) require vastly different hole diameters, and the "saddle clamp" for the drain line requires a specific drilling precision to avoid leaking. The root cause of most installation failures is using the wrong drill bit size, which leads to either a faucet that wobbles in the hole or a drain saddle that doesn't seal because the hole was drilled too large. To confirm you have the right setup, check your faucet box: if it has a single stem, you need a 1/2" hole; if it has a secondary tube for the air gap, you need a 1 1/4" hole. Furthermore, the feed water adapter requires a precise fit to the cold water shut-off valve to prevent slow drips that can ruin your cabinetry over time. FIX To complete the ROES-50 installation without errors, gather these specific tools and follow this sequence: Countertop Drilling: Use a power drill with a 1/2" high-speed steel (HSS) bit for the standard faucet. If you are installing the air-gap version, switch to a 1 1/4" hole saw bit. Place a scrap piece of wood underneath the countertop to prevent "blow-out" or cracking of the stone/laminate when the bit breaks through. Drain Saddle Installation: Locate the drain pipe above the P-trap. Use a 1/4" drill bit to bore a hole directly through the PVC pipe. Ensure the drill is perfectly perpendicular to the pipe; if you drill at an angle, the rubber gasket of the saddle clamp will not seal, causing a leak under your sink. Cold Water Connection: Use an adjustable wrench (Crescent wrench) or a pair of Channellock pliers to tighten the feed water adapter onto the cold water shut-off valve. Tighten until snug, but do not over-torque, as the plastic threads on some newer valves can strip. Tubing Connections: While the Quick-Connect fittings are designed for hand-tightening, you will need a sharp utility knife or a dedicated tubing cutter to ensure the 1/4" poly-tubing is cut exactly square. A diagonal cut will cause the O-ring in the fitting to leak. Final Tightening: Use the adjustable wrench to secure the faucet mounting nut under the sink. Ensure the faucet is centered and vertical before fully tightening the nut against the countertop. IF THAT DIDN'T WORK Leaking at the Drain Saddle: If the 1/4" hole was drilled too large or at an angle, the saddle clamp will leak. Instead of using the clamp, purchase a 1/2" x 1/4" drain saddle replacement kit or a dedicated RO drain valve that threads directly into the sink tailpiece. Difficulty Fitting the Feed Adapter: If your shut-off valve is an old-style compression valve and the adapter doesn't fit, you will need a 1/2" NPT to 1/4" RO adapter fitting from a hardware store to bridge the gap. Faucet Wobble: If the 1/2" hole was drilled too wide, the faucet will tilt. Use a stainless steel oversized washer or a rubber gasket shim between the countertop and the mounting nut to stabilize the unit. Tubing Won't Seat: If the tubing isn't locking into the Quick-Connect fittings, check for burrs on the end of the pipe. Use a fine-grit sandpaper to smooth the edge and ensure the cut is 90 degrees. HEADS UP Flush the Lines: Always run the system for 2 full tanks (approximately 12-15 gallons) before drinking the water to remove carbon fines and preservative chemicals from the new membranes. Check for "Air Locks": If water doesn't flow immediately, you may have an air bubble. Gently tilt the RO housing units while the system is pressurized to help the air escape. Avoid Over-Tightening: The plastic housings for the pre-filters can crack if you use a wrench on them. Always hand-tighten the canisters and use the provided housing wrench only for filter changes. Leak Detection: After installation, place a dry paper towel under every connection point for 24 hours. Even a single drop of water on the towel indicates a leak that must be fixed before you close the cabinet doors.

Question 25

APEC ROES-50 just stopped making water completely, tank is empty. system shut off abnormal?

Accepted Answer

DIAGNOSIS When an APEC ROES-50 completely stops producing water and the storage tank is empty, the system has likely entered a "stalled" state where the osmotic pressure cannot overcome the back-pressure of the system, or the automatic shut-off valve (ASO) is stuck in the closed position. This usually happens because the membrane has become fouled or the pre-filters are clogged, preventing enough water from reaching the membrane to create the pressure differential needed to push water into the tank. Another common culprit is a failed Automatic Shut-Off Valve (ASO). This four-way valve is designed to stop the flow of water once the storage tank reaches its maximum pressure (typically around 30-40 PSI when full). If the internal diaphragm in the ASO ruptures or becomes jammed, it may signal the system to stop producing water even when the tank is empty. You can confirm this by checking the drain line; if the system is not producing water but the drain line is bone dry (no constant trickle), the ASO is likely blocking the feed water entirely. Conversely, if the drain line is running constantly but the tank is empty, the membrane is likely fouled or bypassed. FIX Follow these steps to restore water production and reset the system pressure: Verify Tank Valve Position: Locate the blue plastic valve on top of the storage tank. Ensure the handle is turned exactly parallel to the tubing. If it is perpendicular, the tank is isolated and the system will stop producing water once it hits the internal pressure limit. Perform a Manual Pressure Reset: Close the cold water supply valve (the small valve connecting your home plumbing to the RO system). Open the RO faucet on your sink and leave it open for 30 seconds to bleed off any trapped air or residual pressure. Check Pre-Filter Differential: Remove the three pre-filter housings (Sediment, Carbon, and Carbon). If the housings are difficult to unscrew or the filters look dark brown/black, they are restricting flow. Replace these immediately using standard 10-inch filters. Test the ASO Valve: Locate the small square plastic block where four tubes meet. This is the ASO valve. Gently tap the side of the valve with the handle of a screwdriver. If water begins to flow into the system, the diaphragm was stuck. Re-pressurize the System: Slowly open the cold water supply valve. Listen for the "hiss" of water entering the membrane. Leave the RO faucet open for 2 minutes to flush any air pockets before closing it to allow the tank to refill. IF THAT DIDN'T WORK Check the Membrane Seal: The RO membrane (the large bottom housing) may have a shifted O-ring or a collapsed brine seal. Unscrew the membrane housing, pull the membrane out slightly, and push it back in firmly to ensure it is seated deep in the socket. If the membrane is more than 24 months old, the pores are likely clogged with mineral scale, and you must replace the membrane element. Inspect the Check Valve: There is a small one-way check valve located where the membrane housing connects to the output line. If this valve fails, water will leak back from the tank into the membrane, preventing the system from ever reaching the pressure required to shut off. Replace the check valve fitting if you hear water "sloshing" back toward the membrane. Verify Home Water Pressure: Use a pressure gauge on your main line. The ROES-50 requires a minimum of 40 PSI to operate efficiently. If your home pressure has dropped below 35 PSI, the system cannot overcome the air bladder pressure in the storage tank. In this case, you will need to install a permeate pump or a booster pump. Test the Tank Bladder: Lift the storage tank. If it feels heavy (full of water) but no water comes out of the faucet, the internal bladder has ruptured. Use a tire gauge to check the air valve (Schrader valve) at the bottom of the tank. It should read 7-10 PSI when the tank is empty. If water squirts out of the air valve, the tank is dead and must be replaced. HEADS UP Filter Schedule: Replace the three pre-filters every 6 months to prevent the RO membrane from fouling, which is the #1 cause of production stoppage. Sanitization: Whenever you open the membrane housing, wipe the interior with a mild bleach solution to prevent biofilm buildup from clogging the ASO valve. Leak Detection: After any repair, wrap a dry paper towel around the ASO valve and check-valve fittings for 10 minutes to ensure there are no micro-leaks. Avoid Kinks: Ensure the tubing leading to the ASO valve is not pinched or bent at a sharp 90-degree angle, as this restricts flow and triggers premature shut-off.

Question 26

my APEC ROES-50 is barely trickling water, takes forever to fill a glass. what's wrong?

Accepted Answer

DIAGNOSIS The slow trickle in an APEC ROES-50 is typically caused by a drop in pressure across the membrane or a failure in the storage tank's air bladder. In a healthy system, the RO membrane processes water slowly, but the pressurized storage tank holds that water and pushes it out rapidly. If you are getting a trickle, it means either the membrane isn't producing water fast enough to fill the tank, or the tank is full but lacks the internal air pressure to push the water through the faucet. To confirm the root cause, perform a "Tank Isolation Test." Locate the blue plastic valve on top of the storage tank and close it. Open the RO faucet. If the water flows for a few seconds and then slows to a tiny drip, your membrane is working, but your tank is likely depressurized. If the water is a trickle from the very start with the tank closed, your pre-filters are clogged or the RO membrane (the heart of the system) has reached its end-of-life and is fouled by mineral buildup. FIX Depending on your diagnosis, follow these specific steps to restore flow: Repressurize the Storage Tank: If the tank feels heavy (full of water) but the faucet trickles, the internal bladder has lost its air charge. Turn off the water supply and open the RO faucet to drain any remaining water. Locate the air valve (Schrader valve) usually found on the side or bottom of the tank. Using a low-pressure tire gauge, check the PSI. It should be between 5 and 7 PSI when the tank is empty. Use a bicycle pump to add air in small increments until you hit 7 PSI. Replace the Pre-Filter Set: If the tank is light and the flow is slow, your sediment and carbon filters are likely saturated. Replace the three pre-filter cartridges (Sediment, Carbon Block, and GAC). Ensure you use the correct 10-inch housings. After replacing, run the water for 10 minutes to flush carbon fines before they hit the membrane. Swap the RO Membrane: If the pre-filters are new and the tank remains empty, the membrane is fouled. Turn off the supply and the tank. Open the membrane housing (the horizontal canister) by twisting the cap. Pull out the old membrane and insert a new APEC-compatible 50 GPD (Gallons Per Day) membrane. Push it firmly until it seats completely into the brine seal. Inspect the Auto-Shut Off Valve (ASO): Locate the square-headed plastic valve in the center of the unit. If it is stuck or clogged, it can restrict flow. Tap it gently with the handle of a screwdriver to ensure the internal diaphragm is moving freely. IF THAT DIDN'T WORK Check for Kinked Tubing: Inspect the 1/4" LLDPE tubing, specifically where it enters the tank and the faucet. A single sharp bend or a tube pinched against a cabinet wall can restrict flow to a trickle. If you find a kink, cut the tubing cleanly with a square-cut tool and re-insert it into the push-fit connector. Verify Feed Water Pressure: The ROES-50 requires a minimum of 40 PSI to operate efficiently. If your home's street pressure is low or you have a faulty Pressure Reducing Valve (PRV) on your main line, the system cannot overcome the osmotic pressure of the membrane. Install a pressure gauge on your cold water line to verify you are above 40 PSI. Clean the Faucet Aerator: Occasionally, the issue isn't the system but the faucet itself. Debris or calcium scale can clog the small orifice of the RO faucet. Unscrew the nozzle if possible or use a needle to clear the exit hole of any mineral deposits. Replace the Check Valve: The one-way check valve (located at the exit of the membrane housing) can fail or get stuck. If this valve doesn't open fully, water cannot move from the membrane into the storage tank, resulting in a slow flow regardless of filter health. HEADS UP Avoid Over-Pressurizing: When adding air to the tank, never exceed 10 PSI. Over-inflating the bladder can rupture the internal diaphragm, requiring a total replacement of the storage tank. Sanitization Cycle: Whenever you replace the membrane, it is a best practice to sanitize the system with a diluted bleach solution to prevent biofilm buildup in the storage tank. Filter Schedule: To prevent "trickle flow" in the future, replace pre-filters every 6 months and the RO membrane every 24 months, depending on your local water hardness. Flush After Service: Always drain the first two full tanks of water after changing filters or membranes to ensure no loose carbon or preservative chemicals reach your glass.

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