Importance

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Abstract

An improved reverse osmosis unit is provided for use in a water purification system, wherein the reverse osmosis unit includes an integral control valve for regulating water inflow in response to system demand for purified water. The reverse osmosis unit includes a feed water inlet receiving a supply of ordinary tap water or the like for flow through a reverse osmosis cartridge having a membrane for separating the water inflow into a relatively pure water supply and a reject water supply with impurities concentrated therein. The pure water supply is coupled through a pure outlet port for collection within an appropriate storage vessel to await dispensing through a faucet valve or the like, whereas the reject water supply flows through a reject outlet port for discharge to a drain. When the storage vessel reaches a predetermined or substantially filled condition, the fluid pressure within the storage vessel acts against a control piston to displace the reverse osmosis cartridge and an integrated inflow control valve carried thereby toward a position closing or throttling the incoming feed water flow.

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First Claim