Patent ID: 8343338

Claim:
A reverse osmosis liquid filtering assembly comprising: a) an inlet supply; b) a reverse osmosis membrane for receiving the inlet supply and creating permeate and concentrate; c) a tank connected to the reverse osmosis membrane for storing the permeate in a permeate chamber and the concentrate in a concentrate chamber; d) a faucet for dispensing the permeate; e) a drain for disposal of waste; and f) a valve assembly including three sub-assembly valves: i) the first sub-assembly valve defining an inlet connected to the inlet supply and an outlet connected to the concentrate chamber; ii) the second sub-assembly valve defining an inlet connected to the permeate chamber and an outlet connected to the faucet; and iii) the third sub-assembly valve defining an outlet connected to drain, an inlet connected to the inlet supply, and a port connected to the concentrate chamber, wherein the port is selectively in fluid communication with the third sub-assembly outlet and inlet, wherein when the faucet is closed, the first sub-assembly valve is closed at least in part due to pressure created in the second sub-assembly valve, the second sub-assembly valve has no flow, and the third sub-assembly valve is set to open a first flowpath between the third sub-assembly port and outlet at least in part due to pressure created in the second sub-assembly valve, and when the faucet is open, the first sub-assembly valve is opened at least in part due to pressure dropping in the second sub-assembly valve, the second sub-assembly valve has the permeate flowing there through, and the third sub-assembly valve is set to open a second flowpath between the third sub-assembly port and the inlet at least in part due to pressure dropping in the second sub-assembly valve.