CMP 4-1/8" FD Spa Jet Internal [Dir Smth Scal] [Gray] (23540-111-000) airbuttons and this Magic Plastics version

and this Magic Plastics version features a 1-1/2 inch MBT by 1-1/2 inch slip configuration using the 0611-15 reference

1/8 inch MPT connection with SPDT switching format

The dedicated hydrostatic-valve purpose gives this tool practical value because removal tools work best when they are matched to the part being serviced

A pump union is one of the most useful fittings in a serviceable plumbing layout

CMP 4-1/8" FD Spa Jet Internal [Dir Smth Scal] [Gray] (23540-111-000) airbuttons and this Magic Plastics versionThe CMP spa jet internal is designed for compatible spa jet applications where a 4 1 8 inch face diameter directional internal needs replacement. A jet internal is useful because it shapes how water moves through the jet face, supporting the intended directional massage action and overall spa jet performance. This replacement is especially useful when the original internal is cracked, worn, clogged, or no longer rotating or directing flow correctly.