Overflow Advice

[Sangheili]

Hey everyone, I recently purchased a used Oceanic XL 67g tank. It has a center overflow with 2 drilled holes.

First question, what size bulkheads do I need? I want to replace the used ones. One has 1.5" PVC attached to it, the other has 3/4". Are these the bulkhead sizes as well?

Secondly, what type of overflow would be best? I was thinking durso but it looks like 1.5" durso will not fit without major modifications to shorten the PVC 90 and T. See pics below. Should I step down to smaller diameter PVC?

Thanks for the help.

 

[Sangheili]

Here are some pics of the plumbing that came with the tank.

 

[Finnaddict]

1st question: yes pipe size will tell you what size BH you have.

2nd question:I usually build my durso with 1.25 PVC and use a street L (which is a shortened 90) which gives you the clearance you need inside the OF.

 

[Sangheili]

How about threaded vs slip bulkheads?

 

[Finnaddict]

I think that is preference. I prefer slip BH's over threaded. reason being, while your unscrewing something out of your BH you can spin the BH and cause it to leak.

 

[Sangheili]

Got the return manifold done up (most of it is not glued in case I change my mind) and also the durso overflow. I was able to make it fit using the street ell and trimming it down.

Everything look good? Am I messing something up?