4-Way Automatic Shut-Off Valve for Reverse Osmosis System, Reverse Osmosis Drinking Water Filtration

Uses the back pressure created by the storage pressure tank (or the float valve) to stop the water supply to the reverse osmosis membrane. 6.35 mm push-fit fitting. If your wastewater distribution system continues to flow into the drain even after the tank is full, you may need to replace your old ASO valve with this replacement ASO valve. Used on reverse osmosis systems.