We have a generic Whirlpool jet from Hydro Air Ind. that has a back on it that will not work for this application as a drop-in replacement. But, we have a back from a different jet that may allow it to be installed. See the 2 items below. This is a “best guess” effort at a replacement for a discontinued jet.

HAI16-5759GRY Requires a 3.5” hole for installation. The white PVC fitting in the picture is the “diffuser”. It allows the jet to draw air into the jet stream, and also directs a certain amount of water out the front of the jet. This fitting is too long and will not fit inside the cabinet of the spa ...

SUN6541-805 orifice, $2.82. This is a diffuser with the same glue fitting as the other diffuser above, but is much shorter. We “hope” it will fit and function properly. The orifice on this diffuser does not allow as much water through it as the discontinued jet. It will have somewhat less pressure than the original.