2" Small Flange split nut for pump housing. They are made to replace pump union nuts. They have a small flange, and are not for heaters unions. The overall diameter of the 2" split nut is 3-1/4" and the flange side opening is 2-3/4". This split nut will fit most 2" pump unions. Due to the small flange, they will not fit heater union assemblies. We recommend a Flat Gasket to help ensure a water tight seal.
Note: The 2.0" is not the actual measurement but a representation of the inner diameter of the plumbing that is used.