"Spagold" Filtration Sand Filter, which is one of the essential pool products, is made by the advanced arts and crafts technology. The improvement of flow ability provides an extra pure water filtration. The fiberglass winding design allows the filter to have extra strength and resistance to chemical and corrosives. "Spagold" Fiberglass Sand Filter is the first choicefor swimming pool and SPA equipment. Multi-port Valve: 1, Filter (Normal Filtration and Vacuuming)2, Backwash (Cleaning Filter by reversing the flow)3, Rinse (Use after backwash to flush dirt from valve)4, Waste (By-passed filter, used for vacuuming to waste or lowering water level)

5, Recirculate (by-passes filter for circulating water pool)6, Closed (shut off all flow to filter or pool)7, Winter (Open winter).