The value priced SwimPro™ high rate sand filter range by Hayward® is manufactured in the United States of rugged, durable, color-fast molded polymeric material to assure long life. Each filter features a high efficiency top diffuser and innovative under-drain to assure balanced flow and maximize the filter's backwash performance. The top diffuser evenly distributes the unfiltered water across the entire sand media bed, in a cascading umbrella like pattern. SwimPro's included multi-port control valve features up to seven positions to quickly and easily backwash the filter to clean the sand bed of dirt and debris. The SwimPro™ filter is virtually maintenance free and value priced thanks to advanced USA manufacturing efficiences. Choose SwimPro™ by Hayward® for affordable and efficient pool filtration.