Patent ID: 7862723

Claim:
Apparatus for purifying water, comprising: a reverse osmosis cartridge including a semipermeable membrane for providing purified water and a concentrate; a reverse osmosis module for housing the reverse osmosis cartridge, the reverse osmosis module including a feed line, a drain line, and a product line; a prefilter, the prefilter being connected to the feed line; a hydraulic shut-off mechanism, the hydraulic shut-off mechanism in direct fluid communication with the reverse osmosis module and directly and operatively coupled to the drain line and the product line, and containing a slide valve and two gaskets adjacent to the slide valve; and an appliance, the appliance being connected to the product line, operatively associated with the gasket, and in direct fluid communication with one of the gaskets, whereby activation of the appliance causes purified water to flow at the appliance and initiates a pressure drop across the hydraulic shut-off mechanism, the pressure drop causing movement of the gaskets thereby causing production of the purified water without a booster pump, a storage tank, or electricity and wherein at least one of the gaskets is configured to start or stop the production of concentrate.