Advice needed - chrome tubing

[midweek]

Hi all

I've been putting together a build using chrome tubing and am having a hell of a time trying to secure the tubing in the compression fittings. Essentially even though I'm sure the tubing is fully seated in the fitting and the compression fitting is tight they don't seem to hang on to the tube properly.

The tubing is 14OD from Barrow and the compression fittings are THESE from Barrow as I thought matching brands was best.

In one disastrous leak test the down pipe from the vertically mounted GPU intake simply popped out, flooding the bottom of my case!

I'm chamfering and sanding the cuts but is there something more I should be doing?
Or are the Barrow fittings (or any fittings I suppose) not designed to support the weight of a down tube?

Really wanted to do chrome as it looks great but I may need to just go back to PETG which is much easier to work with.

Ta

 

[Radox-0]

It should work, use Barrow chrome tubing and there hard line compression fittings. I can for example by holding the fitting pick it up, with chrome tubing attached + bunch of heavy fittings and the tubing still stays secure in the compression fitting I am lifting from and dangling down. connection is extremely secure I find. In years of use with said chrome tubing of same size and there fittings on multiple builds never had an issue.

I usually only chamfer and its worked fine and pull off any flakes I can get to I can see. That said, I have only used there other rigid fittings and not tried there smooth fittings.

To confirm there is multiple O-Rings? So in my fittings there is an Oring it seems which secures down on the tubing and then another O-ring onto which the compression locks secure's down.

 

[midweek]

To confirm there is multiple O-Rings? So in my fittings there is an Oring it seems which secures down on the tubing and then another O-ring onto which the compression locks secure's down.

Thanks mate. In tearing down the loop after it popped I discovered that not only had I managed to burst one of the internal o-rings on the fitting but I'd forgotten to put the bl**dy compression o-ring in as well!

In short, I've been a clown.

I must admit the shiny fittings are much more difficult to secure but they look good once fitted.