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Help RE: PETG tubing not going into fitting the whole way.

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ryguy762008

New Member
Joined
Jul 6, 2015
Hey fellow water coolers:

I am doing my first hard tube loop. I got bitspower 16mm OD PETG and some 16mm bitspower enhance multi link for OD 16mm. (links to parts below)

https://pcpartpicker.com/product/pc...-for-16mm-od-rigid-tubing-deluxe-white-4-pack

https://shop.bitspower.com/index.php?route=product/product&path=130&product_id=2901

The problem I am having is when I insert the PETG into the fitting, it only goes in like 1mm. It definitely doesn't go the whole way back to hit the interior wall of the fitting at 5mm.

I did one run between fittings of this type and tightened everything up. With some gentle pulling it feels secure, but I'm a little nervous. I can't imagine that's enough overlap, even with the o rings, but that could be just because I'm used to soft tube compression fittings.

Is the PETG suppposed to go the whole way in? If so, what am I doing wrong?

BTW, I double checked the sizes on the labels on both the fittings and PETG.


Thanks!!
 

bigtallanddopey

Member
Joined
Nov 7, 2016
It definitely needs to go the whole way in. Do not risk it if it isn’t. Did you de burr the ends of the tube? Just running the edges on some sandpaper is enough for this.


 

InsertNameHere

Registered
Joined
Dec 11, 2018
Hey fellow water coolers:

I am doing my first hard tube loop. I got bitspower 16mm OD PETG and some 16mm bitspower enhance multi link for OD 16mm. (links to parts below)

https://pcpartpicker.com/product/pc...-for-16mm-od-rigid-tubing-deluxe-white-4-pack

https://shop.bitspower.com/index.php?route=product/product&path=130&product_id=2901

The problem I am having is when I insert the PETG into the fitting, it only goes in like 1mm. It definitely doesn't go the whole way back to hit the interior wall of the fitting at 5mm.

I did one run between fittings of this type and tightened everything up. With some gentle pulling it feels secure, but I'm a little nervous. I can't imagine that's enough overlap, even with the o rings, but that could be just because I'm used to soft tube compression fittings.

Is the PETG suppposed to go the whole way in? If so, what am I doing wrong?

BTW, I double checked the sizes on the labels on both the fittings and PETG.


Thanks!!

Do you have any pictures of the tubing in the fitting.

I use 16mm fittings from EK. There tubing/fitting tolerances are really small. So you have to push quite hard especially with a new fitting to get it seated properly. Try dipping the tube in water sometimes that helps get it past the o-rings.

If that fails try some other tubing from a different manufacturer. The tolerance might be lower allowing you to push the tubing in using less force



 

bigtallanddopey

Member
Joined
Nov 7, 2016
Maybe the PTEG is out of spec. Where did you get it from?

That could easily be the case. I had to buy 3 lots when I built my last loop. Measured each one with a digital calliper and they were all different. The one that was perfect was the cheapest off of eBay. A little annoying that this happens when we spend so much on the water cooling stuff.