Could someone tell me the size of the megaflow holes?

[HippieSmell]

Could someone tell me what the size of the actual holes are on a megaflow? I know they use 1" and 3/4" schedule 40 bulkheads, but I want to make sure I order a bulkhead that fits.

 

[raddogz]

Not that I want to be a dumb-***, but I have put in schedule 40 bulkheads - one inch and three-quarter inch variety without an issue.

Are there different sizes?

 

[HippieSmell]

After browsing different sites it looks like sched 40 bulkheads are standardized. I guess I should have done that before asking, I just wanted to be sure.