2 inch Spa Hot Tub Heater Union and Pump Gasket _Replaces 711_4030_

You are looking at a 2" Pump and/or Heater Union Gasket. The Pump and/or Heater Union receives a 2" gasket with a lip on it. The lip usually measures 2 1/2" and fits in a groove in the union that is 2 1/2". The outside diameter of the gasket is 2 7/8" and the inside hole is 2 3/16". This gasket goes on unions between the union and pump wetend fittings and heaters and union fittings. Note: There are some of these gaskets that are smaller on the outside diameter but have the 2 1/2" rib this gasket will work in that application. There are also unions that require a flat gasket or an o-ring but this gasket fits most 2" applications this one is most popular!