This high performance, totally corrosion proof sand filter that blends superior flow characteristics and features with ease of operation. The tank is molded of polymeric material hdpe that withstands natures worst. The filter has a 6 position multi-port valve with flange clamp design which allows a 360 degree rotation for easy installation. The top diffuser ensures even distribution of water over the top of the sand media. The main internal pipe is 1. 5 inch in diameter to give smooth, free flowing performance. Built-in drain allows for rapid winterizing or servicing.-Pump NOT included