- How the Automatic Shut-Off Valve Works:
- The valve automatically shuts off production when the tank pressure reaches approximately 65% of the incoming line pressure to indicate the tank is full.
- The ASO valve saves thousands of gallons of water. Reverse Osmosis Systems without an Automatic Shut-Off valve continually send rinse water to the drain even when the tank is full.
- Automatic Shut-Off Valve Example Process:
- Feed water goes through a set of three pre filters (Sediment filter, Carbon filter, Carbon filter), passes through the ASOV, and then goes to the RO membrane to produce RO water.
- The RO water passes through the system to be stored in the water tank. When the tank fills with RO water and the tank pressure reaches 40 psi, the back pressure will reverse the ASOV diaphragm and will shut off due to the pressure differential.
- When the RO water end pressure is greater than the Feed water pressure, it causes the piston to move downward and shut off the in and out channel.
- When the ASOV In and Out channel shuts off, the system will not produce any RO water.
So, if you're not using it w/ a closed tank it's basically useless as there is no back pressure. I applaud you for wanting to know how your unit works, seems many have them and have not a clue