Waterway Cartridge Mounting Assembly [1 1/2" NPT] (400-9120) wyes and this Filbur FC-0705 cartridge

and this Filbur FC-0705 cartridge is designed for C-7603 and PBH12

Correct matching matters because the right control pack should preserve the original operating feel of the spa while restoring dependable heating

not just a generic substitute

or is no longer driving the connected component reliably

Waterway Cartridge Mounting Assembly [1 1/2" NPT] (400-9120) wyes and this Filbur FC-0705 cartridgeThe Waterway 400 9120 cartridge mounting assembly is designed for compatible filter applications using a 1 1 2 inch NPT connection. A mounting assembly like this is useful because it helps connect and support the cartridge related component properly within the plumbing layout, contributing to a more secure and serviceable installation. When the original mounting assembly becomes damaged or incomplete, the filter related setup can become harder to