Patent ID: 6908546

Claim:
A water purification system having: a feed water inlet; a first pass reverse osmosis filter assembly receiving feed water from the feed water inlet; a second pass reverse osmosis filter assembly receiving purified water from the first pass reverse osmosis filter assembly producing further purified water; a purified water distribution system for distributing purified water to points of use, the purified water distribution system being coupled to said reverse osmosis filter assemblies without any intermediate water storage, and being adapted to return purified water to at least one of said reverse osmosis filter assemblies to continuously purify the water and ensure microbiological purity in said purified water, the purified water distribution system including a variable speed pump for creating sufficient water pressure in the distribution system to maintain carbon dioxide in solution and produce an acidic environment; and a reject water distribution system for returning reject water from the first pass reverse osmosis filter assembly and the second pass reverse osmosis filter assembly to the first pass reverse osmosis filter assembly.