Bulkhead Question

[tnknkr3]

What size whole saw bit is needed for 3/4" bulkheads? I must be looking in the wrong place and or not understanding what I'm finding myself. Any help will be greatly appreciated.

 

[Crabs McJones]

What size whole saw bit is needed for 3/4" bulkheads? I must be looking in the wrong place and or not understanding what I'm finding myself. Any help will be greatly appreciated.

From BRS
35mm Glass Drill bit works with 3/4" ABS Bulkheads
42mm Glass Drill bit works with 3/4" heavy duty SCH 80 Bulkheads