Details: This Hayward Pro Series sand filter for in-ground swimming pools will provide you with hassle-free, effective filtration. The weather-proof tank is constructed of a tough, color-fast polymeric material and topped with a patented 6-position multi-port valve that features easy-to-use lever action. Even water distribution over every square inch of sand is ensured by an integral top diffuser, self-cleaning under drain and 360 degree slotted laterals. Thorough backwashing allows for crystal-clear water. Advanced full-flow technology reduces energy costs by achieving excellent filtration, so you can run your filter less. Filter is complete with tank, 7-way multi-port valve, sight glass and pressure gauge. 7-way Valve Positions: Filter, Waste, Winter, Closed, Backwash, Recirculation, Rinse.