Hayward Pro Series Sand Filter for Above Ground Pools Hayward pro series sand filter for above ground pools evenly distributes unfiltered water through the sand bed to allow for the best possible filtration. Also featuring a self-cleaning under-drain construction, the Hayward pro series sand filter quickly returns clear water to your pool. Moreover, Hayward sand pool filters are designed to be energy efficient so you cut on energy costs while doing your part to protect the environment. The Hayward pro series sand filter for above ground pools Are designed to be assembled quickly Have pumps and filters that are matched for performance to promote maximum flow and energy efficiency Have an optional pump timer Include the 7-position Vari-Flo valve for maximum flow even when the pressure drops Feature advanced full-flow technology for enhanced flow rates and optimal filtration Feature rugged construction for maximum durability Are competitively priced