Reverse Osmosis Drain Check Valve

A check valve is a one way valve.

Reverse osmosis drain check valve.

Constant water running to the drain simply means that the aso is not shutting off. This allows pressure to build up so the auto shut off can activate and shut the system off. Generally it is spring operated and when flow comes from the wrong side the valve will close with the pressure to prevent flow. Check valve this is what i replaced.

This is usually a small inexpensive part but it is essential to the function of the unit. Both the aso valve and the check valve are working fine. 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. The ro installer has already tried the following solutions with no luck.

Replaced system and tank added check valve to the drain increased tubing. 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. Each reverse osmosis valve is used to accurately and safely control the flow within various steps in a reverse osmosis system.

Check drain water by either listening or actually pulling out the drain line to look at it. 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. If drain water stops running the ro is shutting off properly. 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.

A common concern with a reverse osmosis drinking water system is water continuously running to drain. Reverse osmosis systems used with an auto shut off valve require a check valve to prevent backflow. Every reverse osmosis unit has a one way valve called a check valve in the permeate line as it leaves the ro membrane housing. Https amzn to 33ih7ls ge reverse osmosis system.

The aso operates if the membrane flow restrictor tank and check valve are all performing properly. Https amzn to 2ozdnws auto shut off valve.