Hayward Swimclear 525sq. ft W3C5030W3C5030 ECONOMICAL PERFORMANCE: The Hayward SwimClear 525 sq. ft. pool filter provides excellent filtration and hydraulic performance for reduced cost of operation NO BACKWASHING REQUIRED: Cleanable cartridge elements eliminate the need for backwashing DURABLE DESIGN: Filter tanks are made from the most durable materials to meet the demands of the toughest applications and environmental conditions EASY TO USE: Heavy duty, single piece flange clamp is