Pool filter system

Claim 1

A pool filter system for attachment at a single water level opening in an above-ground pool wall comprising: a unitary housing having a vertical chamber therein and a horizontal support plate extending across said chamber near its lower end; a pump suspended from the lower end of said housing and having its inlet communicating with said chamber below said support plate; said support plate having a plurality of vertical openings therein, a plurality of apertured pipes mounted in said openings in the support plate and extending upward therefrom inside said chamber, a plurality of generally cylindrical filter cartridges mounted on said pipes above said plate to filter the water passing down through said chamber and through said cartridges and pipes and said openings in the support plate into the pump inlet; said housing at one side thereof near its upper end having a laterally outwardly offset portion integral therewith which presents a horizontal inlet passage leading into said chamber near the latter''s upper end and a horizontal discharge passage immediately below said inlet passage, each of said passages being open at the outer end thereof away from said chamber in the housing for registration with said opening in the pool wall; said housing at said one side thereof having an outer portion thereof which is offset laterally inward from the outer ends of said inlet and discharge passages and defines a vertical pressure chamber located outside sAid firstmentioned chamber in the housing, said pressure chamber having its lower end connected to the outlet of said pump and having its upper end opening into said discharge passage; means for sealingly attaching the outer end of said offset portion of the housing to the outside of the pool wall around the single opening therein with the outer ends of said inlet and discharge pasages both registering directly with said opening in the pool wall; and rigid stand-off means extending laterally outward from said outer portion of the housing at a location thereon substantially below said offset portion of the housing for engagement with said pool wall to space the lower end of the housing rigidly from the pool wall.