2.0" PVC union threads are 3 to 3 1/16" across the outer diameter of the thread body.
(This union will not fit Hayward pumps). 2 inch part number is 400-5570.
Pipe side openings can be trimmed with a jig or coping saw to allow for slightly larger pipe size. PLEASE NOTE If you have a hayward brand or Jacuzzi brand pump, these union nuts will not fit! Both Jacuzzi and Hayward use specific union threads that are not compatable with the split nuts above. Help Request
Additionally found on most Jacuzzi Whirlpool Tubs. Help Request
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