These easy-to-operate high-tech sand filters provide superior flow and outstanding performance. Sand filters include a seven-position dial valve with a flange clamp attachment that allows for 360 degree rotation, which makes it ideal for any replacement application. All tanks have 1.5 in. connections at the dial valve. Easy-access drain plug simplifies winter maintenance. Top internal diffuser ensures even distribution of water over the sand bed. Must use #20 silica sand or ZeoSand®.