CMP 4-1/8" FD Spa Jet Internal [Dir Smth Scal] [Gray] (23540-111-000) airbuttons Useful when a larger trim

Useful when a larger trim or fit solution is needed

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

In a seven-button layout

Supports cleaner and more dependable filtration performance

1/8 inch MPT connection with SPDT switching format

CMP 4-1/8" FD Spa Jet Internal [Dir Smth Scal] [Gray] (23540-111-000) airbuttons Useful when a larger trimThe 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.