Blue-White 3/8" OD Tubing Viton/Aflas Foot Valve (C-340A) switches and this Filbur FC-0133M cartridge

and this Filbur FC-0133M cartridge is designed for PSG40N-P4-M spa and pool applications

Matching the correct B8 application helps preserve original electrical compatibility and reduce replacement uncertainty

giving you better control than trying to improvise with general-purpose tools that were never made for the job

Supports cleaner alignment

Supplying it without brass fittings can also be helpful when existing fittings remain usable or the application requires different connection hardware

Blue-White 3/8" OD Tubing Viton/Aflas Foot Valve (C-340A) switches and this Filbur FC-0133M cartridgeThe Blue White foot valve is designed for compatible chemical feed applications where suction line flow control is needed at the supply container. A foot valve is useful because it helps maintain prime and support one way flow at the end of the suction line, contributing to more dependable chemical feed operation. This replacement is especially useful when the original foot valve is sticking, leaking back, damaged, or no longer holding prime