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Need help with hard tubing / fitting compatibility

post #1 of 5
Thread Starter 
I posted in another thread about acryllic pipebending but no one responded.

Can someone please help me figure out if these fittings and tubing are compatible? The guy I spoke with at performance pcs did not know.

Alphacool HT 13mm Compression Fitting
http://www.performance-pcs.com/fittings-connectors/alphacool-ht-13mm-compression-fitting-g1-4-for-plexi-brass-tubes-knurled-deep-black.html

PrimoChill 1/2in Rigid PETG Tubing
http://www.performance-pcs.com/rigid-hard-tubing/primochill-1-2in-rigid-petg-tubing-36in-clear-12-pack.html

I was able to get the fitting on, although it was a bit tight (I didn't hulk out putting it on, but it didn't slide on either). Once it was on, I tightened the collar and it seemed solid. I was able to pull it off the tube though. Is this normal? The guy at PPC's said I should use glue and I hadn't heard of that before. I've looked up some videos but haven't found an answer yet.

I appreciate anyone taking the time to help me out with this.
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post #2 of 5
Definitely don't use glue.

Considering the fact that your fittings are 13 mm and you tubing is 12.7 mm (theoretically) the fit should be loose if anything. Do you have a caliper to measure the tubing? Make sure you are putting a chamfer on the edge of the acrylic that is sliding past the o-ring. also, take a cotton swab soaked with a little distilled water and wet the o-ring before you put that tube in there. If you are putting more than ~10 lb of force after you do all this you might have a problem. Otherwise, a tight fit is what you want, so you should be fine. It is possible to pull the tube out once everything is tightened, although it requires a good amount of force.
post #3 of 5
Thread Starter 
Quote:
Originally Posted by mtrapuzz View Post

Definitely don't use glue.

Considering the fact that your fittings are 13 mm and you tubing is 12.7 mm (theoretically) the fit should be loose if anything. Do you have a caliper to measure the tubing? Make sure you are putting a chamfer on the edge of the acrylic that is sliding past the o-ring. also, take a cotton swab soaked with a little distilled water and wet the o-ring before you put that tube in there. If you are putting more than ~10 lb of force after you do all this you might have a problem. Otherwise, a tight fit is what you want, so you should be fine. It is possible to pull the tube out once everything is tightened, although it requires a good amount of force.

Thanks for the response. I'll check tonight but I had heard that since they were different sizes it's best to go with tubing from the same company. I haven't put a chamfer on the edge though and I'm sure wetting the O-ring would help as well. Would 13mm tubing from Alphacool work with the fittings I listed?
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post #4 of 5
I think you will be fine with the 1/2" but yes, I would have bought some 13 mm tubing in the beginning. Once you do what I said it will go smoothly.
post #5 of 5
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Quote:
Originally Posted by mtrapuzz View Post

I think you will be fine with the 1/2" but yes, I would have bought some 13 mm tubing in the beginning. Once you do what I said it will go smoothly.

Thanks for the help, I appreciate it!
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