Waterway 7 1 2" [50 Sq. Ft.] Top Load Cartridge Filter With Bypass Valve & 10 Tablet Brominator [2"] (502 5050) topsideparts A correctly selected replacement helps A correctly selected replacement helps preserve the intended scheduling behavior of the system instead of forcing a less suitable substitute into an important control position this heater helps restore steadier heating performance and supports a more complete Integrated systems can be especially practical where space efficiency and equipment consolidation matter this Waterway top load cartridge filter is a practical option when a 50 square foot filter with bypass valve and 10 tablet brominator is needed