The hayward filters use a cartridge system. Cartridge filtration has been available for a relatively long time, but only recently has it begun to enjoy rapid growth. Water passes through the hayward cartridge filters; dirt is screened out at the surface of the element. When clean, the element will trap larger particles first, with finer particles being filtered out as the element becomes clogged by the larger debris. The element can be removed and cleaned by pressure washing with a hose. The hayward filters are available in sizes 25 sq. ft. to 175 sq. ft. We also carry above ground pools, pumps, heaters, solar and safety covers, water bags, replacement parts and more.