Hayward EC40C91S Perflex 3/4-Horsepower Extended-Cycle D.E. Filter System Pump-to-filter union connection provides simple installation and winterization. 20 sq. ft. Effective filtration area. Corrosion-proof, modular platform base accepts optional chlorine feeder. Maximum pool size 19,000 gallons (based on 8-hour turnover rate). Optional Microprocessor Pump Timer Feature Available. 1 1&#8260;2-inch hose packages include: two (2) 1 1&#8260;2-inch x 6-foot lengths of hose adapters and hose clamps