O-Rings & Gaskets

This Part is a Set of (2) Standard 2" Heater or Pump Union Gasket with a lip that is 2 1/2" Center to Center. The gasket is 2 7/8" across on the outside the inside diameter is about 2 3/16" and the lip that fits into the union is...

You are buying a 2 1/2" Thread X 2" Slip Heater Union with Gasket that matches Union. The Union receives a 2" pipe or fitting on the glue side and then Screws to a 2 1/2'" Heater Flange using a 2 1/2" Nut on the heater side...

This part has been discontinued by it's manufacturer.. You are buying a 2 1/2" Thread X 1 1/2" Slip Heater Union with Gasket that matches Union. The Union receives a 1 1/2" pipe or fitting on the glue side and then Screws to a 2...

This part is a Set of (2) 2 1/2" Heater Nut Kit which includes the nut, split retainer and a Therm Style gasket for use with a 2 1/2" Heater Union. Note: You need to measure your T gasket bead part that fits into the groove to be sure you get the...

This part is a Set of (2) 2 1/2" Pump or Heater Union Gasket Only for use with a 2 1/2" Pump Union that meausres about 3 5/8" inside the threads. This gasket measures 3 1/4" O.D. x 2 3/8" I.D. and the lip is 2 7/8" center to center.  This...

  Note: Before You Buy This Part be sure it is correct..It would be very rare for this to be your heater nut unless you have Swim Spa with a very large 3" heater... These are found in some smaller hot tubs but is very rare. Watch the video and...

  Note: Before You Buy This Part be sure it is correct..It would be very rare for this to be your heater nut unless you have Swim Spa with a very large 3" heater... These are found in some smaller hot tubs but is very rare. Watch the video and...

You are buying a 1 7/8" Center to Center O-Ring that fits 1 1/2" Heater Union that features a 1 7/8" groove. The O-Ring is 1 7/8" center to center and fits most 1 1/2" heater unions but there are exceptions which normally would be a 2 1/8" center to...

This part is a Set of (2) 2 1/2" Therm Style Pump or Heater Union Gasket Only for use with a 2 1/2" Heater or Pump Union. If your heater or Pump is 2 1/2" this part could be correct we offer (2) different sizes of 2 1/2" gaskets so you need to...

This part is a Standard 2 1/2" Pump Union O-Ring. The O-Ring is 2 1/2" Center to Center across and fits some unions but there are exceptions so please see the pictures and compare. This part is used in hot tubs between a pump...