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3/8" ID 5/8" OD not fitting on any compression's I throw at it?

post #1 of 21
Thread Starter 
Hello, I am very glad to join overclock.net!

I am doing my first water cooling build, and picked out some tubing/compressions by some recommendations but it is just not working. I am currently using 3/8" ID 5/8" OD PrimoFlex PRO LRT UV Blue tubing. I have used many barbs/compressions: Koolance, Bitpower, Monsoon Free Center Compression, XSPC and more. None of them seem to be working, and I really want to stay away from clamps because of the aesthetics of it.

So my question is:

Does anyone know any 3/8" ID , 5/8" ID tubing that works well with compression fittings? Seems as if my PrimoFlex Pro LRT UV Blue tubing does not work with any fittings I try to throw at it. Thanks!
Edited by Rokinon - 4/28/12 at 1:37pm
post #2 of 21
Quote:
Originally Posted by Rokinon View Post

Hello, I am very glad to join overclock.net!
I am doing my first water cooling build, and picked out some tubing/compressions by some recommendations but it is just not working. I am currently using 3/8" ID 5/8" OD PrimoFlex PRO LRT UV Blue tubing. I have used many barbs/compressions: Koolance, Bitpower, Monsoon Free Center Compression, XSPC and more. None of them seem to be working, and I really want to stay away from clamps because of the aesthetics of it.
So my question is:
Does anyone know any 3/8" ID , 5/8" ID tubing that works well with compression fittings? Seems as if my PrimoFlex Pro LRT UV Blue tubing does not work with any fittings I try to throw at it. Thanks!

Are you using the correct compression size? It has to match the tubing size.

If it is, you just need to be more forceful, or try dipping the end of the tubing in warm water to soften it up.
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post #3 of 21
Thread Starter 
Thanks for the reply!

Yes, I am using the exact dimensions

And yes I have done both of those things. My hands are practically bleeding from the force I have been putting on these!
post #4 of 21
Quote:
Originally Posted by Rokinon View Post

Thanks for the reply!
Yes, I am using the exact dimensions
And yes I have done both of those things. My hands are practically bleeding from the force I have been putting on these!

Just to be sure we are on the same page, you are having trouble slipping the tubing onto the barb and you have removed the outer ring of the fitting right?

If so, the way I normally get the tubing on it is to slip one end over and then work on sliding the other end down, since the tubing stretches a bit it normally goes on pretty smoothly.
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post #5 of 21
Thread Starter 
Sorry for the confusion. The compression will not fit over the tubing once onto the barb.

It fits perfectly on the barb.

Thanks.
post #6 of 21
I use 1/2 - 3/4 primoflex tubing and have no issues putting the fittings on. Only with bitspower fittings, They are a pain to put on sometimes.

I also put my tubing in warm water to loosen it up alittle.
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post #7 of 21
Thread Starter 
I have spent so much money on compression's already so the last think I really want to do is go out and buy all new barbs :\
post #8 of 21
shure you have 5/8" OD fittings and not 1/2" OD? the only reason i can think of is if the tubing doesnt match the fittings...
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post #9 of 21
Thread Starter 
3/8 5/8, 100% sure. :\
post #10 of 21
Primochill tubing is pretty rigid I had trouble getting the ring to screw on the cap if there were any major bends, with Bitspower I had to really push the cap onto the threads and keep the tubing as straight as possible.. heating it up really helps. What's the width of the cap? from the outermost side to the inner side of the cap, could be that the cap is too thick for the tubing's walls.
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