Bulkhead Confusion

[Forty-Two]

Hi there

Ive got a tank on order from Miracles, and they have drilled the holes and its about to be assembled.

The holes in the back of the tank are 41mm, which I assumed should be sufficient (and I did ask around but didnt get a lot of answers) for a 40mm bulkhead.

I did manage to find this option:

11.82US $ 30% OFF|Flowcolour 40mm UPVC Bulkhead Aquarium Tank Water Pipe Connector Industrial Water Treatment PVC Pipe|Pipe Fittings| - AliExpress

Smarter Shopping, Better Living! Aliexpress.com

www.aliexpress.com

But Im seeing a lot of bulkheads that are looking for a 43mm hole etc.

Feedback on whether the link should fit or not?
Thanks

 

[Forty-Two]

Hmm looks like the link broke - here are the specs

 

[Saltyreef]

Hi there

Ive got a tank on order from Miracles, and they have drilled the holes and its about to be assembled.

The holes in the back of the tank are 41mm, which I assumed should be sufficient (and I did ask around but didnt get a lot of answers) for a 40mm bulkhead.

I did manage to find this option:

11.82US $ 30% OFF|Flowcolour 40mm UPVC Bulkhead Aquarium Tank Water Pipe Connector Industrial Water Treatment PVC Pipe|Pipe Fittings| - AliExpress

Smarter Shopping, Better Living! Aliexpress.com

www.aliexpress.com

But Im seeing a lot of bulkheads that are looking for a 43mm hole etc.

Feedback on whether the link should fit or not?
Thanks

Heres a quick guide....

Are you talking about the return holes or the drain holes?

If return then those are going to be standard for 3/4" bulkheads.

A standard 3/4" bulkhead from brs will suffice.

 

[KC's CNC Creations]

a standard 1" bulkhead will not fit in a 41mm hole, the minimum is 42.5mm and a 41mm is way too big for a 3/4" bulkhead (sch 80 might work.....).

with that said, the one you linked to says it's suitable for holes 40-43mm so it will work with the 41mm hole and if i read the specs right it's a 1.25" bulkhead.

 

[Saltyreef]

a standard 1" bulkhead will not fit in a 41mm hole, the minimum is 42.5mm and a 41mm is way too big for a 3/4" bulkhead (sch 80 might work.....).

with that said, the one you linked to says it's suitable for holes 40-43mm so it will work with the 41mm hole and if i read the specs right it's a 1.25" bulkhead.

Actually,
3/4 bulkheads call for 34mm to 52mm.
The photo i posted isnt the most accurate for min and max.

Op, rest assured your 41mm holes will fit a standard sch. 40 3/4 bulkhead.

How To Select and Properly Install Aquarium Bulkheads

Bulkheads allow you to transfer water from one side of an aquarium to the other and allow for traditional PVC plumbing to be connected. In most aquariums, bulkheads are used for drain and return pipes on your display tank but can be used for many other things too. Some tanks come pre-drilled for...

www.bulkreefsupply.com

 

[KC's CNC Creations]

Actually,
3/4 bulkheads call for 34mm to 52mm.
The photo i posted isnt the most accurate for min and max.

Op, rest assured your 41mm holes will fit a standard sch. 40 3/4 bulkhead.

How To Select and Properly Install Aquarium Bulkheads

Bulkheads allow you to transfer water from one side of an aquarium to the other and allow for traditional PVC plumbing to be connected. In most aquariums, bulkheads are used for drain and return pipes on your display tank but can be used for many other things too. Some tanks come pre-drilled for...

www.bulkreefsupply.com

By all means, feel free to use a 41mm hole with YOUR 3/4 bulkhead...........i'll refrain. the entire OD is only 52.6mm............i don't see 0.6mm being sufficient to remain 'water tight'

 

[Saltyreef]

By all means, feel free to use a 41mm hole with YOUR 3/4 bulkhead...........i'll refrain. the entire OD of is only 52.6mm............i don't see 0.6mm being sufficient to remain 'water tight'

A 3/4" bulkhead has a 1.5" OD diameter behind the flange.
Thats only 3mm difference.
Looks like you have a 1/2" bulkhead there....

 

[KC's CNC Creations]

A 3/4" bulkhead has a 1.5" OD diameter behind the flange.
Thats only 3mm difference.
Looks like you have a 1/2" bulkhead there....

Not my first rodeo cowboy........

 

[Saltyreef]

Not my first rodeo cowboy........

Lol now im a cowboy?

Im confused by your suggestion.
You say entire diameter is 52.6mm.
His hole is 41mm.
I dont understand your theory of the .6mm coverage unless he was trying to use it in a 52mm hole....

 

[KC's CNC Creations]

Lol now im a cowboy?

Im confused by your suggestion.
You say entire diameter is 52.6mm.
His hole is 41mm.
I dont understand your theory of the .6mm coverage unless he was trying to use it in a 52mm hole....

you said in an above post (i can quote you again if necessary) that a 3/4 bulkhead could use a 52mm hole...........52.6 minus 52 is 0.6. ?

 

[Saltyreef]

i'll type this slow so you can keep up..........you said in an above post (i can quote you again if necessary) that a 3/4 bulkhead could use a 52mm hole...........52.6 minus 52 is 0.6. was that slow enough?

So he CAN use a 41mm hole now?
Make up your mind KC.....

 

[Forty-Two]

Well at least the topic isnt straightforward, that gives me a little comfort.....

They are indeed return holes. Im on metric - as my sump is on metric and has a 40mm return (outside diameter - not sure what that is on the inside tbh - I think its 33mm), and 3 intakes (40mm/40mm/32mm).

I'll see what Miracles says - whether they think the bulkhead I linked/added the screenshot of will fit.

I would ideally like them to test with a 40mm bulkhead before shipping...because its a LONNGGGG shipment and I would hate to make a mistake this fundamental at this point.

Also its a 220 Gallon tank, the return pump is capable of 6500 l/h

 

[Forty-Two]

Actually it looks like I can just get them from Royal Exclusiv if Im reading this right...

PVC Bulk head // tank fitting grey diameter Ø 40 mm

PVC Bulk head // tank fitting grey diameter Ø 40 mm

royalexclusiv.net

 

[BZOFIQ]

The topic is simple. I think.

I pulled below from the AliExpress you linked to

 

[BZOFIQ]

 

[KStatefan]

I have never seen bulkheads like that.

 

[Forty-Two]

I have never seen bulkheads like that.

Metric rules.

Thanks all for the input(s) btw!

 

[Saltyreef]

Metric rules.

Thanks all for the input(s) btw!

Sorry i didnt know you were overseas lol.
I was giving you the correct info in standard units lol

 

[Forty-Two]

Its ok. Im now having fun trying to figure out a way to reduce it to use loc-line.

Is loc line even necessary? Are there other options that people have used?

 

[KStatefan]

Metric rules.

Thanks all for the input(s) btw!

Are all metric bulkheads designed like that?