Reverse Osmosis Drain Check Valve

Replaced system and tank added check valve to the drain increased tubing.

Reverse osmosis drain check valve.

Both the aso valve and the check valve are working fine. Check drain water by either listening or actually pulling out the drain line to look at it. This will stop any flow in or out of the tank and make the system think that it has a full tank. Generally it is spring operated and when flow comes from the wrong side the valve will close with the pressure to prevent flow.

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. Turn off the shut off valve on your reverse osmosis storage tank by giving one quarter turn. Check valve this is what i replaced.

99 2 00 item get it as soon as thu sep 17. A check valve is a one way 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. 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.

Https amzn to 2ozdnws auto shut off valve. Constant water running to the drain simply means that the aso is not shutting off. Reverse osmosis systems used with an auto shut off valve require a check valve to prevent backflow. Wait for 3 5 minutes then check to see if the drain water stops running.

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. Every reverse osmosis unit has a one way valve called a check valve in the permeate line as it leaves the ro membrane housing. A common concern with a reverse osmosis drinking water system is water continuously running to drain. Each reverse osmosis valve is used to accurately and safely control the flow within various steps in a reverse osmosis system.

This is usually a small inexpensive part but it is essential to the function of the unit. This allows pressure to build up so the auto shut off can activate and shut the system off.