Riddle me this /diy/: I am attempting to make a 2''

are the male and female threads the same length?

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>>1114685
Yes, but it only goes in this far.

>>1114687
you, surely, are not screwing these together only with your hands?

The thread is probably tapered.
The further you screw it on, the tighter it gets.
It's not supposed to screw all the way together.

>>1114681

It can only be thread taper or length.

It looks like a parallel thread in the picture. if so measure the amount still showing when tightened and cut that amount from the male thread.

>>1114693

To add if there is a taper then this method will not work.

Try putting female part into warm water, and male part into fridge for 15 minutes.
Then put them together.

If that still doesnt work, I would say that the threads have been manufactured incorrectly

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>>1114681

Oh and a possible solotion is to get a nut or washer similar to pick related to close the gap

>>1114690
I laughed so fucking hard, then told my wife the story. This is exactly what he's doing.

>>1114690
Why would I screw them together elsewise? I only need them hand tight, I want to be able to tinker with it, not have it sealed beyond belief.

>>1114693
I tried this with another set, and it still refused to tighten beyond a similar amount. so I think >>1114694 is right.

>>1114696
Going to try this.

>>1114698
If the lowes had something similar, I would have loved to buy that.

>>1114700
Right you are, but why would I want to use tools such that I can't undo it?

>>1114681
>bulkhead fitting

won't the bulkhead take up the space?

>>1114704
>Why would I screw them together elsewise? I only need them hand tight, I want to be able to tinker with it, not have it sealed beyond belief.
Well, the thing is, pipes have tapered threads. Why? Cause it can be sealed (as opposed to threads found on fasteners). You's gots to crank that shit if you don't want no leaks.

>>1114700

If it was designed to be heavily tightned then it would have a hex both sides, to get that many turns it would most likely snap the fitting.


This is either two incompatible threads or its meant to go either side of something quite thick.

welder reporting in.

Often stainless steel threads can 'gall', and lock themselves together.

I have no experience much with plastic materials, so my question is, can galling occur in plastics?

>>1114709
from my understanding of what a bulkhead fitting is, no? I couldn't find a 2'' one at any local stores, so i went ahead and just bought these pieces and a rubber that is 2'' such that i can drill a hole that accommodates the male end and i tighten the female part around it, with the gasket preventing leaks from the container i'm putting this in.

>>1114711
Interesting, as I would doubt that any water would leak out of the pipe with a tightness that i am encountering.

>>1114713
I am inclined to agree that it would snap it, is there any way you see me being able to tighten it without this happening?

the crest of the male thread may be slightly oversized.

it might be possible to slightly abrade some of the crest to get a looser fit

>>1114719

how wide is the gap and how wide is the washer and bulkhead combined?

By the time you add these you really aught to be just about there.

What exacty do you plan to do?

>>1114719
http://www.lascofittings.com/assets/1824/imgpvc5.jpg
Take a look at this table

>>1114719
>with the gasket preventing leaks from the container
there is no flat surface for your gasket to seal against.

drill your hole
put O ring on male end
stick through hole
put another O ring on male end sticking out
tighten female end on male end

you really need to get a bulkhead fitting and quit trying to invent one from wrong parts

The male part has taper threads so it will seal when it is tightened into the female part.
It's made to be a watertight joint for two pieces of pipe that can be unassembled when necessary.

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>>1114704
>If the lowes had something similar, I would have loved to buy that.

https://www.lowes.com/pd/Camco-Manufacturing-Water-Heater-Drain-Pan-Fitting/50271995

>>1114725
less than half an inch, it's a bucket.
I intend to create an auto siphon with this hole in the bucket, similar to the siphon i have built in my garden for aquaponics.

>>1114726
Thank you. Unfortunately, I don't know if I could even get this 7 turns past hand tight, and it is wildly unneeded to be able to withstand that much psi.

>>1114727
the flat surface is the bucket that I will be drilling it into, but your wise words of just buying the right part does sound like what will need to have happen as I can't seem to get these two to work.

>>1114729
if they had it for 2'' that'd be great, but the listed model is only for 1 or 1.5

>>1114735

Right if you really wanted to use this there is a possible bodge job
You can do.

Cut 1/4-1/3 off the tip of the female fitting where it is at its widest, then use the tip as if it was the nut on a usual tank connector, this will only work if the female side is taperd and not parallel.


you dont have much of a face on the female tho so sealing the O ring could be troublesome.

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>>1114735
>if they had it for 2'' that'd be great, but the listed model is only for 1 or 1.5

https://www.lowes.com/pd/Charlotte-Pipe-1-1-2-in-x-2-in-Dia-PVC-Adapter-Coupling-Fitting/3132735

>>1114738
Very true. I'll just buy the 2'' bulkhead fitting and wait.

>>1114739
close but i need it to be 2'' all the way through

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>>1114765
>close but i need it to be 2'' all the way through

go back to lowes
go to electrical
buy pic related
it should have straight threads

https://www.lowes.com/pd/CARLON-2-in-PVC-Adaptor/3261529

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>>1115002

while you're in that department
look for pic related
may need to trim opening

https://www.lowes.com/pd/Gampak-2-in-Rigid-Bushing/1092765

or just ask for a 2" conduit nut

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>>1115006

like one of these

https://www.lowes.com/pd/Gampak-2-in-Rigid-Bushing/1092765

bit they are plated steel so may not bu suitable

while you're there, ask about 2" gaskets

>>1115012

you can find your own gaskets

I'm tired of shopping Lowes for you today.

>>1114704
>such that I can't undo it?

PVC threads are pretty soft. They don't take a lot of screwing and unscrewing before they cross thread, wear and become unusable. So you can undo them a few times, but not much more or they will leak and possibly just pop apart.

>>1114692
This
They're not designed to thread all the way down to the flange

>>1115002
this is the correct answer and it shouldn't have taken this long to come to the conclusion. if you have a hard flat piece of plastic between it is watertight. but try a few out in the store. the electrical ones are not tapered and the pvc ones in plumbing are tapered.