Details: This Cristal-Flo II top-mount high rated pool and spa sand filter has durable one-piece extra-thick molded polyethylene tank. Internal air relief hole allows air to automatically escape, preventing high pressure buildup. 6-Position valve allows to perform all necessary water movement functions; a transparent sight-glass adapter is included. Large drain plug is easy to get at for removing and installing by hand or with tools if required. Contemporary style with a textured black finish that provides superior performance in all weather conditions. It has effective filtration area 2.3-square feet and flow rate is 60-GPM. Available in black color. Measures 22-1/2-inch length by 34-inch height by 19-2/5-inch width.