Bulkhead and loc line question

[FiberglassMonkey]

I'm ordering from bulk reef supply and had a few questions.

I have 1.25in and 1.75in holes in my aquarium. I need 1/2 in and 1in bulkheads correct?

And looking at the bulkheads what npt connector should I get for the returns that are 1/2 in bulkheads? The 3/4in or 1/2in... Basically what threads into the bulkhead size is it I'm needing?

Trying to get return line set up for my tank... I believe I have the drains figured out.

Tanks in advance

 

[Hookem2006]

You'll need a 1/2 NPT for the 1/2 bulkhead.

 

[FiberglassMonkey]

@Hook'em2006 wrote:

Thanks! I was thinking that but just needed a 2nd.

 

[melev]

A 1.25" hole holds a 3/4" bulkhead, and a 1.75" hole holds a 1" bulkhead.

If you want to install locline into the 3/4" bulkhead, the inside should be FPT (female pipe thread), as the locline will have a MPT (male pipe thread) connection hopefully. You would screw in that fitting into the bulkhead.