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potato_man

Should I be able to pull my hard tubing out of its fitting?

13 minutes ago, potato_man said:

i just measured the OD of the tubing and ID of the fitting. Tubing OD is 14mm and fitting ID is 14.5mm. Also what do you mean by compressed? I'm not using compression fittings.

Those fittings you listed are hardline compression fittings they compress the oring which then pushes onto the exterior diameter of the tubing to hold into place. Are you not installing the second oring between the barb section and the compression ring?

Image result for hardline compression fittings

 

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Posted · Original PosterOP

when I put my tubing into my fitting it is very loose and I can pull the tubing out. what am I doing wrong? I got 13/10 fittings and tubing

1557465720672944506836.jpg

1557465759160193052578.jpg

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Are the fittings and tubing from the same brand?


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Could be manufacturing tolerances. Try to get another tube of fitting to test. 

Sure, you could always just put bunch of o rings on the fitting collar, butit still might leak


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That will be down to manufacturing tolerances being different between the fitting and the tubing.

 

Since you bought it from aliexpress i'd suggest best bet would be to see if u can source some larger o-rings for cheap, otherwise ur looking at either hoping for the best with what you have, or buying a new fittings and/or tubing.

 


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Posted · Original PosterOP

Just got hard tubing and fittings from aliexpress. My fittings and tubing are 10mmx14mm and the fittings are push-in fittings. When I put the tubing into the fitting, it goes in easily and doesn't fall out when I shake the tubing, but if I pull on the tubing it comes out. Is this normal?

 

Product links https://www.aliexpress.com/item/OD-12mm-14mm-16mm-PETG-Water-Cooling-Rigid-Hard-Tube-for-PC-Water-Cooling-System-50cm/32921663155.html?spm=a2g0o.cart.99999999.259.3da33c00ftcYgM

https://www.aliexpress.com/item/14mm-G1-4-Thread-Acrylic-Hard-Tube-Fitting-Hand-Twist-3-Laps-10x14mm-Connector-For-PC/32900929599.html?spm=a2g0o.cart.99999999.265.3da33c00ftcYgM

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47 minutes ago, potato_man said:

Just got hard tubing and fittings from aliexpress. My fittings and tubing are 10mmx14mm and the fittings are push-in fittings. When I put the tubing into the fitting, it goes in easily and doesn't fall out when I shake the tubing, but if I pull on the tubing it comes out. Is this normal?

 

Product links https://www.aliexpress.com/item/OD-12mm-14mm-16mm-PETG-Water-Cooling-Rigid-Hard-Tube-for-PC-Water-Cooling-System-50cm/32921663155.html?spm=a2g0o.cart.99999999.259.3da33c00ftcYgM

https://www.aliexpress.com/item/14mm-G1-4-Thread-Acrylic-Hard-Tube-Fitting-Hand-Twist-3-Laps-10x14mm-Connector-For-PC/32900929599.html?spm=a2g0o.cart.99999999.265.3da33c00ftcYgM

It should be fairly difficult to remove the tubing from the fitting once compressed. Sounds like the tolerances of your tubing may be slightly undersized and the fitting potentially a touch oversized. Take a pair of calipers and measure the OD of your tubing. 

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Posted · Original PosterOP

i just measured the OD of the tubing and ID of the fitting. Tubing OD is 14mm and fitting ID is 14.5mm. Also what do you mean by compressed? I'm not using compression fittings.

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Posted · Best Answer
13 minutes ago, potato_man said:

i just measured the OD of the tubing and ID of the fitting. Tubing OD is 14mm and fitting ID is 14.5mm. Also what do you mean by compressed? I'm not using compression fittings.

Those fittings you listed are hardline compression fittings they compress the oring which then pushes onto the exterior diameter of the tubing to hold into place. Are you not installing the second oring between the barb section and the compression ring?

Image result for hardline compression fittings

 

-Related Threads Merged- 

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Posted · Original PosterOP

I tried with the o-ring and without the o-ring. In both cases the tubing can be pulled out of the fitting. Also am I supposed to be able to tighten the nut easily when there is an o-ring in between the nut and fitting?

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