This part is a Kit which includes (2) 2" which measure about 3" ID Heater Split Nuts, (4) Screws and (2) Gaskets for use with a 2" Heater Tube & Union.
The Heater Flange Split Nut mounts to the heater tube using 2 screws to hold it in place and screws onto the heater threaded union with a gasket between the union and tube.
If your plumbing is 2" and your heater is 2" this part is correct.
This version is the most popular version. 1 1/2 x 1 1/2 is 2nd most popular and 1 1/2" X 2 is 3rd most popular.
This part is used in hot tubs to plumb a heater tube to a heater union.
Note: The Heater tube in pictures is NOT included!!
