Patent ID: 7947181

Claim:
Apparatus for purifying water, comprising: a feed line for providing unpurified water, the feed line being fluidically connected to a reverse osmosis module; a semipermeable membrane contained within the reverse osmosis module, the semipermeable membrane for producing purified water and a concentrate; a drain line connected to the reverse osmosis module, the drain line being configured to transport the concentrate; a product line directly connected to the reverse osmosis module, the product line for transporting the purified water; an appliance directly connected to the product line; a shut-off mechanism containing a pressure sensor, the pressure sensor including a diaphragm, pressure sensor contacts and a contact disk and being configured to activate the shut-off mechanism responsive to a pressure increase in the product line when the appliance is off, by causing the contact disk to contact the pressure sensor contacts thereby activating a solenoid valve that shuts off the reverse osmosis module; and a flow controller disposed on and controlling the drain line, disposed downstream from the reverse osmosis module and upstream from the shut-off mechanism, and directly coupled to and in fluid communication with the shut-off mechanism.