Reverse Osmosis Drain Check Valve

Reverse osmosis systems used with an auto shut off valve require a check valve to prevent backflow.

Reverse osmosis drain check valve.

Check drain water by either listening or actually pulling out the drain line to look at it. Wait for 3 5 minutes then check to see if the drain water stops running. Turn off the shut off valve on your reverse osmosis storage tank by giving one quarter turn. Constant water running to the drain simply means that the aso is not shutting off.

Https amzn to 2ozdnws auto shut off valve. Since the reverse osmosis drinking water system ro flushes it s waste water while it is filling the tank water running to drain during production is normal but after 3 or 4 hours of zero water usage there should be zero water running to the drain. A check valve is a one way valve. Each reverse osmosis valve is used to accurately and safely control the flow within various steps in a reverse osmosis system.

Every reverse osmosis unit has a one way valve called a check valve in the permeate line as it leaves the ro membrane housing. Generally it is spring operated and when flow comes from the wrong side the valve will close with the pressure to prevent flow. Https amzn to 33ih7ls ge reverse osmosis system. Constant run to the drain the reverse osmosis system shuts down when tank pressure reaches 2 3 of supply line pressure and the aso valve closes.

Check valve this is what i replaced. The ro installer has already tried the following solutions with no luck. 99 2 00 item get it as soon as thu sep 17. Systems that continually run water down the drain may be missing or have a bad check valve and systems that intermittently turn on without any water use.

The aso operates if the membrane flow restrictor tank and check valve are all performing properly. This is usually a small inexpensive part but it is essential to the function of the unit. This will stop any flow in or out of the tank and make the system think that it has a full tank. If drain water stops running the ro is shutting off properly.

Replaced system and tank added check valve to the drain increased tubing. This allows pressure to build up so the auto shut off can activate and shut the system off.