This Kit features a 1 1/2" Threaded Split Nut that goes over the flange of a 1 1/2" Heater Flow Through style Tube... And a 1 1/2" Threaded x 1 1/2" Slip PVC Heater unions as well as a gasket that...
This part is a Heater Tailpiece, 2 1/2"mbt x 2" Slip..
The threaded side measures about 3 5/8" edge to edge and the Slip side measures about 2 3/8" Inside Diameter..
For the gasket that...
This part is a 2 1/2" Heater Split Nut with a Gasket which measures 3 9/16" Inside Diameter of the threads and 3" inside the ceneter part that wraps around a heater tube or body.
The Heater Flange...