I have a hydration bladder with a screw on the drinking hose, and the problem is that given enough time it will come unscrewed and then leak inside my backpack.

I have tried tightening it as hard as I dare, (everything is made of plastic) and it still eventually comes loose.

I could live with a permanent solution, since its fairly uncommon to have to remove the hose, and yet I would prefer something that can be undone if possible.

How can I keep the hose on my hydration bladder from unscrewing?

  • Does the hose screw into the bladder or onto something that is sticking out of the bladder?
    – Willeke
    Commented Jun 1, 2018 at 15:58
  • I wonder if threadlocker would work. Not posting as an answer since I haven't used it myself.
    – LShaver
    Commented Jun 1, 2018 at 16:04
  • @Willeke It sticks out of the bladder just a little bit Commented Jun 1, 2018 at 16:08
  • Sorry @CharlieBrumbaugh, in that case my idea will not work.
    – Willeke
    Commented Jun 1, 2018 at 16:18
  • 1
    If it is a threaded connection you could try a light wrap of plumbers tape. It is made to seal threads from water after all. Although i don't think it is considered food grade so you may want to look into that aspect of it.
    – Nate W
    Commented Jun 1, 2018 at 22:36

1 Answer 1


I looked into it a bit more and I would recommend trying a light coat of plumber's tape on the threads of the hose connection.

Pipe thread tape, or 'plumbing tape' is made from Polytetrafluoroethylene (PTFE). A non-toxic and stable synthetic fluoropolymer


hydration bladder hose wrapped with thread tape

The trick is to wrap it the same way as the you tighten.

PTFE, It is also used in non-stick coatings on kitchenware so for a non-heated application I would say it would be just fine to use.

  • That's a good idea. You could always leave a bit of the tape in your pack too in case repairs are needed.
    – LShaver
    Commented Jun 5, 2018 at 17:14

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.