Hayward SwimClear™ W3C5030 525 SqFt Cartridge FilterFor both new pool and aftermarket installations, the Hayward SwimClear W3C5030 525 SqFt Cartridge Filter provides the most energy efficient flow with no backwashing, saving up to 2,500 gallons of water per year. With a heavy duty dirt holding capacity and an extra long filter cycle, SwimClear filters are available in various sizes, including 225, 325, 425, 525, and 700 sq. ft. This 525 sq. ft. model operates at 50 psi with a flow rate of 150 gpm,