Abstract: A valve assembly for a reverse osmosis water purifier system that contains all of the control and check valves required for the system.

Abstract: A direct acting reverse osmosis water purifier valve is disclosed. The purifier valve has a single diaphragm valve responsive to the pure water pressure to shut off the tap water inlet when the pure water pressure approaches the tap water line pressure, indicating that the pure water storage tank is full. This shut-off valve, in conjunction with the venting of the tap water line to drain within the system upon shut-off, results in a self actuating effect causing the shut-off valve to close in a positive manner once closing is initiated. Similarly, a direct acting pilot valve is used to control the squeeze water control valve to respond as desired to the pure water pressure to control the squeeze water for the purification and dispensing cycles. Functioning of the valve is very similar to that of the prior art though with a much simplified and more reliable structure.

Abstract: The present invention comprises a reverse osmosis water purifying unit in which all the components of the unit are housed in a protective enclosure. In one form the protective enclosure is a water tight protective enclosure which itself is vented to the drain. The only external connections to the enclosure are by means of sealed bulkhead fittings. These fittings are used to connect the water purifying unit to a main water supply line, a dispensing faucet and a drain line. A fourth fitting communicates the inside of the enclosure directly to the drain, or alternatively, the inside of the enclosure is coupled to the drain line internal to the enclosure. The enclosure protects the components of the water purifying system from exposure to outside abuse and damage, and also act to contain and direct and leakage that does occur to prevent any spillage from escaping from the enclosure.

Abstract: The present invention comprises improvements in the design of a control valve for a reverse osmosis water purifier system that prevents the unstable oscillations and waste water leakage exhibited by control valves of the prior art. To eliminate the unstable oscillations caused in prior art valves by back pressure in the pure water delivery line of the purifier system, the present invention incorporates the improvement of an additional hydraulic passage from the squeeze water outlet of the control valve to the back of the control valve's pilot valve diaphragm. The back pressure maintained on the pilot diaphragm by the squeeze water acts as a dampening force preventing the closure of the pilot valve, and hence the adjacent squeeze valve, as a result of back pressure built up in the pure water delivery line during dispensing.