1

I'm putting together a fountain feature in my yard and I'm using vinyl tubing from the pump to the bottom of the feature (which has a copper tube inside). I've got a compression union to connect the two, and I'm pretty sure it'll work fine on the copper side. But on the vinyl side everything I see indicates that I should use a plastic sleeve on the outside of the tube inside the compression nut.

In this case, however, the fitting that I picked up has captured brass sleeves (by which I mean that they're attached to the nut, not a separate piece).

Is this likely to damage my tubing? Should I pick up a different fitting or can I just be extra careful about over tightening?

3
  • I used brass ferrule compression with vinyl tubing quite often and they work well. The only problem I have found is once compressed you have to cut the tubing to replace them. I never have blow outs with brass like I did with the plastic ones.
    – Ed Beal
    May 1, 2016 at 14:20
  • Awesome, thanks. I'll give it a whirl and see how it goes.
    – cori
    May 1, 2016 at 14:58
  • I have also done this in an industrial application for pressure taps. It seems to work well in a non-critical application.
    – Joel Keene
    May 3, 2016 at 19:11

1 Answer 1

3

To get a good "squeeze" when using a brass ferrule on plastic tubing, without collapsing the tube, you should be using a tubing insert:

enter image description here

0

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.