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US 2010/0072118 A1Published application
Low operating head polishing sand filter
AssigneeOasis Filter Ltd.
InventorDavid H. Manz
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Abstract
This invention relates to a novel low operating head polishing sand filter comprising: (a) a plural-layer media bed comprising small, medium and large crushed quartzite; (b) an untreated water inlet system; (c) an underdrain system; (d) a filtered water collection and outlet system; and (e) a backwash water inlet, collection and siphon outlet system.
Claims8
A low operating head polishing sand filter comprising:
- (a) a plural-layer media bed comprising small, medium and large crushed quartzite;
- (b) an untreated water inlet system;
- (c) an underdrain system;
- (d) a filtered water collection and outlet system;
- and
- (e) a backwash water inlet, collection and siphon outlet system.
3 more elements
Dependencies are inferred from the claim text.