Bulkhead question

[boboreef]

My tank is drilled with 2" holes. question is do I buy 2" bulkheads or a size a little smaller or they just fit like a glove

Tia
Leon

 

[stingythingy45]

No a 2 in. bulkhead will not fit.
Let's take a look and see what that will fit.
I'm guessing that a 1 1/2 will fit that.But do some research online.

 

[mnavick]

^ Yupper.
Bulkhead size is usually smaller than drilled size hole.

 

[boboreef]

Great thank goodness I asked, but yeah thanx I'll do some more research

 

[boboreef]

Any expert or own experience on what size I should get?

 

[Duff485]

Is the hole exactly 2"? Im not sure a 1.5 bulkhead would fit. The abs bulkheads from BRS require a 2.3" hole for the 1.5 bulkhead. If it's exactly 2", it sounds more like a 1.25...if they even make those.

Could also be for a 1" schedule 80 bulkhead if the hole is slightly under 2"

 

[JohnK]

Double check that measurement. 1" standard bulkheads fit a 1 3/4" hole. 1" sch 80 bulkhead fits a 1.88" hole.

1.5" standard bulkhead fits a 2.32" hole.

1" schedule 80 will be the best fit assuming the hole is exactly 2". Is this a glass cages tank by any chance? (they usually drill for sch 80 bulkheads IIRC)

 

[boboreef]

You guys were right!! The hole isn't 2" but, my knowledge on rulers stinks big time so what does this say?

 

[JohnK]

Haha, So it looks like a 1" standard schedule 40/ABS bulkhead is in your future

 

[boboreef]

Thanks a whole bunch John!!

 

[boboreef]

Thanks for all the feedbacks

 

[boboreef]

Also, the ball valve and PVC pipes are 1" too?

 

[mchartier]

I always go up at least one size on valves and unions seeing the inside dimensions are smaller.

 

[boboreef]

I always go up at least one size on valves and unions seeing the inside dimensions are smaller.

thanks, so if its a 1" bulkhead the valve and unions will be 2"?

 

[JohnK]

More like 1" bulkhead and pipe, 1.25" valves and unions.

 

[vuchim]

hope the following helps
for 1/2" bulkhead, you want the hole to be 1 1/8
3/4 bulkhead - hole = 1 1/2
1" bulkhead - hole = 1 3/4
1 1/5 bulkhead - hole - 2 3/8

go to marine depot and look under the plumbing parts->bulkhead, it tells you everything there

 

[mchartier]

thanks, so if its a 1" bulkhead the valve and unions will be 2"?

More like 1" bulkhead and pipe, 1.25" valves and unions.

^^ This

 

[boboreef]

Thanx everyone!!!