Hayward W3S180T92S Pro Series Top-Mount 18" Sand Filter and 1HP Power-Flo Matrix Pump with 6' Cord and Base. The W3S180T92S uses 150 lbs of #20 Silica Sand and has a max flow rate of 35 GPM. The W3S180T92S comes with a 6 position multiport valve. The positions are Filter, Backwash, Rinse, Waste, Closed, Recirculate, and Winter. The W3S180T92S comes with the filter, multiport valve, pump, equipment base, and two hoses with plumbing connections. Superior filtration from the inside out. The Pro Series filter features an integral top diffuser that evenly distributes unfiltered water over the sand media bed in a cascading, umbrella-like pattern. This allows the greatest filtration possible from every square inch of sand. Then the self-cleaning under drain assembly, with its 360 slotted laterals, provides a fast, balanced flow of clear water back to the pool while allowing for more thorough back washing. Best of all, the Pro's full-flow technology reduces your energy costs because the filter operates for shorter periods. Seven-position valve puts you in control. The patented, multiport control valve developed by Hayward was designed with seven pool filter positions. An easy-to-use lever-action handle lets you quickly dial any function. Long-lasting convenience. You can easily access the Pro Series filter assembly for simple servicing via the unique folding ball joint in the laterals. A corrosion-proof housing protects the filter from severe weather for years to come.