2-1/2" Pump O Ring Gaskets (pair)

Large o ring gasket for Waterway 2-1/2" pump unions.

Used (only) on the large front union of Waterway pumps.

Gaskets are always measured by the internal diameter size of the pipe the fitting is connected to - really confusing when nothing measures what it says.

To help, the outside diameter of these is 3-1/2"

Every hot tub part is measured in inches.