Handheld Massage Jet

How do I know if it will fit my hot tub?

The handheld jet replaces standard waterway poly jet inserts. These are the most common jets in the industry. The poly jets turn out in a counter-clockwise direction. The diameter on the threads measure 2 inches across. The picture below illustrates some of the many jets that the handheld replaces. If your jets look like any below, they should have a part number on the insert that looks like: 2??-????.