20" Cristal-Flo Sand Filter. You won't burn many calories maintaining Cristal-Flo II Top-Mount Filters. A little two-way wrist action on the control valve puts the Cristal-Flo II to work cleaning itself. And, this is one workout routine you won't have to do very often. Through innovative engineering, the filter's dirt-handling capacity is maximized, which extends the time between cleanings (backwashing).
Features: Quality Construction Durable one-piece extra-thick molded polyethylene tank, Safe Internal air relief hole allows air to automatically escape, preventing high pressure buildup, 6-Position Valve Allows you to perform all necessary water movement functions. A transparent sight-glass adapter is included, Large Drain Plug Large drain plug is easy to get at for removing and installing by hand or with tools if required, Sleek Looks Contemporary style with a textured black finish that provides superior performance in all weather conditions. Will filter up to 21,000 gallons of water in 8 hours, requires 200 # of sand.