DIAGNOSIS: Low pressure is typically caused by kinked tubing, an unflushed system, or incorrect filter installation.
FIX: Systematic check.
- Inspect all plastic tubing under the sink. Ensure there are no kinks, crimps, loops, or folds. Cut away excess tubing if it's creating a tight bend.
- Verify the tubing is fully inserted—1 inch minimum—into all inlets and outlets on the manifold.
- Confirm the filters are installed correctly. For the AQ-6300M, the sequence is Black, White, Yellow. Wrong order can restrict flow.
- Flush the system for 10 minutes if you haven't already. Initial carbon fines can temporarily reduce flow.
IF THAT DIDN'T WORK: Check your home's water pressure. The system requires an operating pressure between 20 and 80 psi. Pressure below 20 psi will result in very slow flow.
HEADS UP: The rated service flow is 0.5 gallons per minute for the AQ-6200/AQ-6300 and 0.72 gpm for the AQ-6300M Max Flow. It will not match the pressure of your main kitchen faucet.