Hayward W3S166T - ProSeries Above-Ground High Rate Sand FilterThe Hayward ProSeries Above Ground High Rate Sand Filter is designed to clean and operate with a variety of pool sizes. This sand filter uses a superior filtration system that uses self cleaning 360 degree slotted laterals that give a balanced flow of clean water delivered back to the pool through a seven position multiport control valve. Use this corrosion proof, weatherproof, and durable filter to ensure that the pool water is always reliably clear