Bulkhead questions

Greg Depo · Sep 12, 2019

So I have a 60mm hole drilled in this tank. I'd like to get a 1" return pipe into the bulkhead however that size it shows only a 1.5" pipe will fit. Whats the best option to get the 1" pipe into the bulkhead? Increase the size to 1.5 prior to the bulkhead? Or is there a bulkhead with larger sides that can make up the difference?

Thanks

infinityends · Sep 12, 2019

You'd need to use the 1.5" bulkhead and then use a 1.5"-1" reducing coupler

Why-Me · Sep 12, 2019

infinityends said:
You'd need to use the 1.5" bulkhead and then use a 1.5"-1" reducing coupler

+1

Rjramos · Sep 12, 2019

Do you have another hole in the bottom of tank? What size? Is the 1.5 gonna be a gravity drain or coming from the pump?

Greg Depo · Sep 12, 2019

Rjramos said:
Do you have another hole in the bottom of tank? What size? Is the 1.5 gonna be a gravity drain or coming from the pump?

There's two 1.5" bulkheads. One for the internal overflow and the 2nd, the one I asked about, is for the return from a 1400 gph pump.

Rjramos · Sep 12, 2019

Bigdeps said:
There's two 1.5" bulkheads. One for the internal overflow and the 2nd, the one I asked about, is for the return from a 1400 gph pump.

How big is the tank? You could move 1400 through 1” pipe.

Greg Depo · Sep 12, 2019

Rjramos said:
How big is the tank? You could move 1400 through 1” pipe.

It's a 75g with a 20 gallon sump. The pump outlet is 1" so I was planning on running 1" to the bulkhead. Was hoping not to have to go up to 1.5" to get through the bulkhead. Then back down to 3/4" for a locline nozzle.

WVNed · Sep 12, 2019

You put a bushing in it

S.O.MLemos · Sep 12, 2019

+1 to the bushing.....and if your going down to 3/4” after it doesn’t really matter how you reduce it because the most restriction will be at the 3/4”

Greg Depo · Sep 12, 2019

S.O.MLemos said:
+1 to the bushing.....and if your going down to 3/4” after it doesn’t really matter how you reduce it because the most restriction will be at the 3/4”

Yeah I've been looking for a reducing bushing to help with the restriction loss. I guess I don't fully understand how the bushing would work inside a bulkhead. The bushing would go on the outside of the bulk head right? If so how would I step it down to 3/4" on the inside of the bushing then?

WVNed · Sep 12, 2019

You put a bushing in the connection outside of the tank and a 1 inch pipe fits the 1.5 inch bulkhead. The inside is another connection with more bushings.

Why-Me · Sep 12, 2019

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Greg Depo · Sep 13, 2019

WVNed said:
You put a bushing in the connection outside of the tank and a 1 inch pipe fits the 1.5 inch bulkhead. The inside is another connection with more bushings.

Not really sure how I can go from 1" bushing in a 1.5" bulkhead on the outside. Then have another bushing on the inside of that same bulkhead that changes the 1" PVC to a 3/4" but fills the 1.5" space of. Confusing that's for sure ha.

Why-Me · Sep 13, 2019

They make a 1 1/2" to 3/4" reducer

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You stick short piece of 1 1/2" pipe in the outside bulkhead and then the reducing bushing I linked then your 1" return pipe will go right into that.
Boom 1" pipe into your 1 1/2" bulkhead.
Then you take two reducing threadxthread bushings on the inside of the tank that will drop from 1 1/2" to 1" then the next one will drop from 1" to 3/4" for your loc line.

I did something similar with my build I went from 1" bulkhead to 3/4" for loc line. I just didn't need to reduce into the bulkhead from outside like you are doing.

I posted a pic, you could do something similar but would need two of those gray threaded reducers.
Btw I used a threadxslip bulkhead for that. Threaded in tank and slip backside for the return plumbing.

Rjramos · Sep 13, 2019

Bigdeps said:
It's a 75g with a 20 gallon sump. The pump outlet is 1" so I was planning on running 1" to the bulkhead. Was hoping not to have to go up to 1.5" to get through the bulkhead. Then back down to 3/4" for a locline nozzle.

Ok. Well the bulkhead has to stay 1 1/2” to seal properly. Place a 1 1/2”x 1” reducer on the bottom and 1 1/2”x 3/4” on the inside and that should do it. Why would they drill 1 1/2” bulkhead holes on a 75 gal I can’t understand, but that’s what you got.‍