2 1/2" Therm Style Union Gasket for Hot Tub Heater & Pump - 3 1/4" OD x 2 3/4" ID

This component is a 2 1/2" Therm Style Union Gasket Only designed for installation with 2 1/2" heater or pump unions in your spa system.

When working with 2 1/2" heaters or pumps, please verify measurements carefully as Global offers two distinct sizes of 2 1/2" gaskets with different specifications.

This particular gasket features dimensions of 3 1/4" O.D. x 2 3/4" I.D. with a lip measuring 3 1/8" center to center. The alternative version available measures 3 1/4" O.D. x 2 3/8" I.D. with a 2 7/8" center to center lip. Among our union gasket offerings, this ranks as the 4th most commonly used size. The 2" size leads in popularity, followed by 1 1/2" in second place and 1" in third. This replacement seal creates a watertight connection between heater tubes and heater unions or between pump unions and pumps in spa plumbing systems.