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

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.

How to Fix It

Follow these precise steps to secure your ROES-50 system for a vacation lasting more than two weeks:

1. 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.
2. Open the RO faucet on your countertop and leave it open for 30 seconds to bleed off the residual line pressure.
3. Close the RO faucet.
4. 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.
5. 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.
6. 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.