Sta-Rite 145362 Cristal-Flo  II Top Mount High Rate Sand Pool Filter, 3.15 Square Feet, 70 GPM, with Multiport Valve Cristal-Flo II top-mount high rated pool and spa sand filter Durable 1-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 Available in black color; measures 28-inch length by 50-inch height by 28-inch width