Hayward S210T93S ProSeries 21-Inch 1.5 HP Sand Filter System Systems are designed for quick assembly and precise alignment of components Pumps and filters are performance-matched to provide maximum energy efficiency Filter bases are molded of rugged thermoplastic for long-lasting, all-weather performance 7-position VariFlo valve provides maximum flow at low pressure drop System includes the sand filter, pump, base and pump to filter plumbing kit.