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Did I buy the wrong tubing/compression fittings?

post #1 of 20
Thread Starter 
Just got my tubing and Bitspower compression fittings. This is my first water cooling project.

The tubing is 1/2" ID 3/4" OD, the fittings are 1/2" ID 3/4" OD. I've read for compression fittings the measurements need to match.

Yet I can't for the life of me get the tubing over the compression fitting. The fit is incredibly tight. I've double checked measurements and packaging, they're the right products.

I can get the tube over the lowest diameter (red) but not the rest:

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post #2 of 20
Quote:
Originally Posted by velocd View Post
Just got my tubing and Bitspower compression fittings. This is my first water cooling project.

The tubing is 1/2" ID 3/4" OD, the fittings are 1/2" ID 3/4" OD. I've read for compression fittings the measurements need to match.

Yet I can't for the life of me get the tubing over the compression fitting. The fit is incredibly tight. I've double checked measurements and packaging, they're the right products.

I can get the tube over the lowest diameter (red) but not the rest:

Code:
    -----||||
---/

---\\
    -----||||
I have the same tubing and fittings. As long as you have the correct ones like you said, it should be good. It'll be a very snug fit, you gotta push it on there!

Also, make sure you're taking off the part of the fitting that screws off.
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post #3 of 20
Thread Starter 
Quote:
Originally Posted by sivarthcaz View Post
I have the same tubing and fittings. As long as you have the correct ones like you said, it should be good. It'll be a very snug fit, you gotta push it on there!

Also, make sure you're taking off the part of the fitting that screws off.
Snug isn't the word I'd use, it's damn painful to get on and off by hand.

I'm not even sure the compression part of the fitting is useful, the tube fits so tight over the barb itself.

Here's some photos:



I take it the tube is suppose to go all the way to the end. I can force it to the end, but the tube becomes very warped and the compression part is even harder to thread on.




This is as far as I can thread the fitting with the tube where it was in the previous photo. Am I suppose to thread it all the way to where the thread stops?
post #4 of 20
Get the barb and the inside of the tube wet. Use something like ky.. Jk i used good old spit, helped it slide right on. Try twisting it on with like a motion that your screwing a screw in. I took the tubing down to the bottom. As far as the fitting, i couldnt get it very far down either. Was a pain in the ass so i got it to catch on and turned it as far as i can. Had about the same space left and havent had a problem for months. Honestly, as long as you get on the fitting and turn it a little bit, that tube isnt going anywhere.

Edit: Your last pic looks good. Thats how i have mine.
Edited by Colonel Sanders - 1/20/11 at 12:01pm
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post #5 of 20
LOL! You have to unscrew the compression ring off first...Funny ish ...
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post #6 of 20
Quote:
Originally Posted by adamlau View Post
LOL! You have to unscrew the compression ring off first ...
he did, look at the first picture in the post..
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post #7 of 20
It's fine that the compression fitting doesn't go all the way down, they're not supposed or required to when the tubing is installed.

As far the installation force goes you just need to push harder. It might surprise you but you really have to push hard on the tubing to get it all the way on. It also helps to wiggle it back and forth a little as you try to push it on.
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post #8 of 20
Try putting the end in boiling water. I was able to get 7/16" and 3/8" over a 1/2" compression. It makes it a lot more flexible.
post #9 of 20
Hehe...Didn't see the first pic . In any event, lubricate the tube using a bit of distilled and use a slight twisting motion.
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post #10 of 20
Thread Starter 
Quote:
Originally Posted by Colonel Sanders View Post
Get the barb and the inside of the tube wet. Use something like ky.. Jk i used good old spit, helped it slide right on. Try twisting it on with like a motion that your screwing a screw in. I took the tubing down to the bottom. As far as the fitting, i couldnt get it very far down either. Was a pain in the ass so i got it to catch on and turned it as far as i can. Had about the same space left and havent had a problem for months. Honestly, as long as you get on the fitting and turn it a little bit, that tube isnt going anywhere.
This is what I'm thinking too. The reason I'm confused is that everywhere I read people make it sound like 1/2" OD 3/4" ID just slips over the barb. I've only read about people needing to warm the tube or use lubricant with 7/16" ID.

So it was a surprise to me that 1/2" 3/4" didn't slip on, and I thought maybe I had bought the wrong size for the fitting or something.

My last question is should I bother using pliers to tighten the fittings? I can get the tube all the way and thread the compression tight with pliers no problem. By hand.. no so though.
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