Hayward S166TPAKS Pro Series Top-Mount Sand Filter 16-Inch with Top-Mount Valve and Base High-performance top-mount sand filter for above-ground pools, small in-ground pools, and aquariums Durable, corrosion-proof filter tank molded of color-fast material for long-lasting, all-weather performance Large pressure sand/water drain for rapid winterizing or servicing; 7-position vari-flo valve provides maximum flow at lower pressure drop Flange clamp design allows 360-degree rotation for easy installation; includes filter, pump base, pump-to-filter hardware, and a hose package Integral top diffuser ensures even distribution of water over the entire sand bed for maximum use of the filtration area