Bulkhead Understanding for Overflows / Returns

[krazycanuck2011]

Hello, I am looking for some help on return bulkhead sizing and just general understanding of a custom tank which I am looking at purchasing locally. It is a custom built tank with 2 overflow boxes. The overflow boxes have a qty of 2 , 2.5" holes in each overflow. The tank is drilled on either side with qty of 2 , 1.5" holes.

I am trying to understand the bulkhead sizing for this tank, and I am not sure if the return lines are big enough for a Jebao DCP-8000 pump.

I have only ever used HOB overflow boxes with flexible hosing so going to a reef ready tank is a slight step up for me.

I appreciate the help.

:hmm4::hmm4::hmm4:

 

[mjstech]

Look up the bulkhead sizes max therotical flow rate. You have 2.5in drill holes which will be 1.5" bulkhead x 4...Then lookup the rating for your pump at the head your system will be at. Accounting a few 45/90s on pump output which will slow it down a little also.

 

[laverda]

They will handle that pump without a problem. I would spend a little more and get a more reliable pump or have a back up plan.

 

[krazycanuck2011]

Bulkheads

Bulkheads

Yes so the 2.5" holes in the overflow require 1.5" bulkheads. But what about the qty of two - 1.5" holes that are in the back of the tank for the return?

The pump can use 1" hard plumbed, I realize it will have the pump will be y-adaptered.

My next question is for the two return bulkhead fitting sizes in the back of the tank. The tank has two 1.5" holes in the back, will a 1" bulkhead fit in a 1.5" hole? Or do I have to use 3/4" bulkheads in a 1.5" hole?

I want to make sure I get it right, as when I order parts they are almost 7-10 days away from me at the earliest.

Thanks for the help.

 

[krazycanuck2011]

Anyone?

Anyone?

Looking to order this evening , anyone???

 

[Lsufan]

The 1.5" holes will be for a 3/4" bulkhead. A 1" bulkhead needs a 1 3/4" hole.

 

[laverda]

It depends on the brand of the bulkheads. Schedule 80 require bigger holes. They should give the deminsions where your ordering from.