Reverse Osmosis Drain Check Valve

The aso operates if the membrane flow restrictor tank and check valve are all performing properly.

Reverse osmosis drain check valve. Generally it is spring operated and when flow comes from the wrong side the valve will close with the pressure to prevent flow. Reverse osmosis systems used with an auto shut off valve require a check valve to prevent backflow. This will stop any flow in or out of the tank and make the system think that it has a full tank. 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.

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. If drain water stops running the ro is shutting off properly. Every reverse osmosis unit has a one way valve called a check valve in the permeate line as it leaves the ro membrane housing. 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.

99 2 00 item get it as soon as thu sep 17. Https amzn to 2ozdnws auto shut off valve. Check valve this is what i replaced. Turn off the shut off valve on your reverse osmosis storage tank by giving one quarter turn.

Eshiong equal straight water purifiers check valve reverse osmosis water filter system plastic quick connect tube fittings 1 4 inch to 1 4 inch od for ro water system pack 6 5 0 out of 5 stars 1. This is usually a small inexpensive part but it is essential to the function of the unit. Check drain water by either listening or actually pulling out the drain line to look at it. The ro installer has already tried the following solutions with no luck.

Https amzn to 33ih7ls ge reverse osmosis system. This allows pressure to build up so the auto shut off can activate and shut the system off. Replaced system and tank added check valve to the drain increased tubing. Constant water running to the drain simply means that the aso is not shutting off.

Wait for 3 5 minutes then check to see if the drain water stops running. A common concern with a reverse osmosis drinking water system is water continuously running to drain.