To see the video related to this part search YouTube for: Heat and Pump Union Gaskets and O-Rings The Spa Guy Parts How To Videos

This part is a Standard 1 1/2" Heater or Pump Union Gasket that has a 1 7/8" Center to Center Rib. The gasket is 2 3/8" across and fits most unions but there a few exceptions. If you order this gasket and the ridge doesn't fit you union you can trim the ridge off and use it as a flat gasket. This part is used in hot tubs between a heater or pump union and the heater or Pump. This version is the second most popular version. 2" x 2" is the most popular and 2" X  2 1/2" is 3rd most popular. 

NOTE: This will not fit most pump unions as they require an O-Ring that is about 2 1/8" center to center as shown in the pump union picture.  9

The Unions shown in the picture section are not included this listing is for the gasket only.

.0-423-1002,44-02319 , 610873 , 711-4050 , 7114050 , 806105124616 , 9175-41,,split,nut, split nut,heater,heaters,balboa,gecko,bath,tub,spa,hot tub,1 1/2", 1-1/2", 1.5,1.5",nut,fitting,hydroquip,hydro-quip,pinnacle,gasket,union

Shipping in The United States is Free. I Ship International Through the Global Shipping Program Only!!