Filtration and backwash control system for water filters associa

Details Filtration and backwash control system for water filters associa Filtration and backwash control system for water filters associa

1990-06-06

1991-10-15

Dawson, Robert A.

Liquid purification or separation

Flow, fluid pressure or material level, responsive

Check valve

137597, 13762529, 13762534, 210278, 210425, F16K 1106

Patent

active

050572148

ABSTRACT:
A filtration and backwash control system for use with replaceable cartridge filters including a spool valve for controlling the flow of filtered water and backwash discharge from an existing faucet spigot having cold water and hot water faucets. The valve is movable between a filter position, wherein cold water is directed through the valve, through a filter, back through the valve and out the cold water faucet, and a backwash position, wherein hot water is directed through the valve, through the filter in reverse flow from filter outlet to filter inlet, back through the valve and out the hot water faucet.

REFERENCES:
patent: 3195726 (1965-07-01), Saurenman et al.
patent: 3526251 (1970-09-01), Rosaen
patent: 3977433 (1976-08-01), Hankison et al.
patent: 4469131 (1984-09-01), Traylor
patent: 4515692 (1985-05-01), Chandler et al.

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