AFW ASV90 ASV90-14Q 90% Auto Shut Off Valve for Reverse Osmosis ASV for RO with permeate Pump, 1/4", Gray;

Regular auto shut off valves will turn off the water feeding the RO system when the tank pressure reaches 60% of the incoming water pressure. When using a permeate pump, the work of feeding the tank has been eliminated. So you can put more water in the tank efficiently. That means you can use the 90% valve which will let the tank fill until it reaches up to 90% of the incoming water pressure. More water in the tank means more pressure at the faucet or ice maker. Only recommended for use with a pump like the permeate pump for best performance. Connects easily with 1/4" quick connect fittings. Comes with an instruction sheet showing you how to connect to your RO system.