2 1-2" Spa Hot Tub Heater Union Therm T Gasket 3 1-4" O.D. 2 3-4" I.D.

This part is a 2 1/2" Therm Style Heater Union Gasket Only for use with a 2 1/2" Heater Union. Note: This listing is a gasket only all other parts are for illustration only. If your heater is 2 1/2" this part could be correct we offer (2) different sizes of 2 1/2" gaskets so you need to verify your measurements. This gasket measures 3 1/4" O.D. x 2 3/4" I.D. and the lip is 3 1/8" center to center. The other gasket we offer is 3 1/4" O.D. x 2 3/8" I.D. and the lip is 2 7/8" center to center. This version is the 4th most popular version. 2" is the most popular, 1 1/2" is 2nd most popular and 1" is 3rd most popular. This part is used in hot tubs to plumb a heater tube to a heater union to a pump.