Waterway 7 1 2" [50 Sq. Ft.] Top Load Cartridge Filter With Bypass Valve [2"] (502 5010) appliedcomputer the adapter is often what the adapter is often what turns a workable fit into a truly polished one and this Herga Electric version is a 3 function DPDT model rated at 20 amps with a 1 2 inch MPT connection using the 59 345 3565 reference A complete filter like this is useful because it provides a straightforward replacement solution for systems that need both cartridge filtration and bypass functionality this Waterway top load cartridge filter is a practical option when a 50 square foot filter with bypass valve and 2 inch compatibility is needed