Bulkheads on 125g reef tank

[Bluecrabber]

So I was dumb and wasn't careful enough with my measurements before I purchased my plumbing supplies for my new tank. It came predrilled and had the hardware for the dual corner overflows. I thought I had 1.5 inch bulkheads but that was the diameter of the hole and what I actually in fact are I believe 3/4 bulkheads.

From what I have researched on picking bulkheads and matching it to diameter of the pvc pipe you're using ABS bulkheads for 3/4 and 1" pipe will fit the same size drilled hole correct? So i should be able to order 1" bulkheads from BRS and do everything in 1"?

Happy for any help and all ideas or suggestions on this. This is my first time plumbing a tank.

 

[mcgyvr]

BRS has the hole sizes for each bulkhead listed on their site...The answer is awaiting you there..

 

[Salty Waffles]

If your 125g is like mine (All Glass RR), the two holes in the overflow are different sizes. I wanted to bump up in bulkhead size but ended up having to go with a 3/4" and 1" ABS bulkhead in each overflow.

 

[nereefpat]

What are the sizes of the drilled holes? Are they all the same? My All-glass 125 has all 4 holes drilled for 1" bulkheads.

 

[Bluecrabber]

Sorry guys for the late reply. Been up round the clock with a newborn.

I did another measure of the holes and got 1.75 inches. Going off the size chart at BRS I freaked out for a second thinking that i could only do 1/2" as max size was 1.72 for that bulkhead. Quickly realizing that didn't make any sense I took a second look and came up with 1" ABS bulkhead. 1.65" min hole with 2.65" max. That makes sense right?

So question then is should I just stick with 1" all around for all 4 drains? Also, is it better to keep return the same or run that 3/4? Planning for dual herbie setup on the overflows and run a single return up the back of the tank.

 

[nereefpat]

If a 1" bulkhead will fit in every hole, then use 1" all around.

As for the return, since it's going over the top, I would use whatever size the outlet of the pump has. It will probably be 3/4 or 1", and either will be fine...reducing pipe diameter reduces flow.

 

[Bluecrabber]

Okay cool. I’m thinking I might do some flex tubing from the pump to pvc for noise. So I’ll prolly just do 1” on the pvc after the connection.

 

[cdbias5]

Maybe helps.