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Irish Cave Diver in the making
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Discussion Starter · #1 · (Edited)
I have a bit of a problem, my P-valve is leaking :embarassed:

It appears to be leaking somewhere around the joint for the balanced bit. Well I am guessing this simply becase of where the damp patch is:


If I use it, then I get a bit damp, if I don't wear it and forget to screw in the screw thing at the outlet, I get a bit more wet.

I haven't a clue how this balanced bit works, so will it hurt if I fill try and glue the tube to the 'T' piece, which is I guess where the problem is coming from. Or will this cause a problem of some sort?

Is there another answer, apart from buying a new one, as I couldn't be bothered with the hassle of trying to unglue the thing and fit a new one.

Thanks
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Mad as a Haddock
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I only ever used the unbalanced version and had no probs, at least down to 30m ish. Then I changed my suit and haven't used it since. try taking the balanced bit off and see what happens.

Good luck

MM
 

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Irish Cave Diver in the making
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3,241 Posts
Discussion Starter · #4 ·
Most people find if they leak it's because they are using the wrong size sheath.

Moving down a size normally fixes it
Fin, it's the tube that has started leaking, not the sheath.

I think I may be a bit delusional if I though my sheath was leaking and that is why my mid thigh was damp :angel:

It also leaks when I am not 'plumbed in' and forget to tighten the screw.
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The smell of freshly turned delrin is more powerfu
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3,173 Posts
If I use it, then I get a bit damp, if I don't wear it and forget to screw in the screw thing at the outlet, I get a bit more wet.
seems very odd the balanced P valve has two non return valves built in.

one stops water coming back down the tube in to the suit ? sounds like yours is not working the one end of tee just lets air in to balance pipe with suit pressure.

are you sure its the p valve leaking and not a dry suit seam near by ?

DAvid
 

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Irish Cave Diver in the making
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3,241 Posts
Discussion Starter · #6 ·
I only ever used the unbalanced version and had no probs, at least down to 30m ish. Then I changed my suit and haven't used it since. try taking the balanced bit off and see what happens.
That might be an answer if it will disconnect from the valve bit easily enough. Though I would have to use it slightly differently wouldn't I? I couldn't just leave the screw open and go as I wanted to.
 

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Irish Cave Diver in the making
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3,241 Posts
Discussion Starter · #7 ·
are you sure its the p valve leaking and not a dry suit seam near by ?
(1) OK, my undersuit can get a bit smelly, but not normally of urine.

(2) I was standing the other night (I hadn't the valve 'plumbed in') holding the RIB in the water as we got it off the trailer when I felt a cold wet feeling in my leg. I looked down and saw bubbles :( The cold wet feeling stopped when I tightened the screw up, I was able to go for a dive with no more water ingress.
 

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Mad as a Haddock
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I always had the screw closed and openned it to go, so to speak.
 

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Nigel Hewitt
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I haven't a clue how this balanced bit works, so will it hurt if I fill try and glue the tube to the 'T' piece, which is I guess where the problem is coming from. Or will this cause a problem of some sort?
The balanced bit is to let air back into the system.
It's a failure point and yours has failed.

Can you hitch the catater straight onto the valve?
Then you're running like the rest of us.

...you did know we were unbalanced?
 

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Irish Cave Diver in the making
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Discussion Starter · #10 ·
Can you hitch the catater straight onto the valve?
Then you're running like the rest of us.
That's what Marky Mark suggested, I don't know - I will have a look when I get home. At least I know I should have enough length on the tube to do that if it will work as I never cut it back when I fitted it.

...you did know we were unbalanced?
The thought had passed my mind once or twice :)
.
 

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7,628 Posts
Is the tubing that connects the T piece ok on all 3 connections? if not, trim as appropriate. Also - does the wet patch smell? this should tell you whether its wee wee or water. Don't be afraid to use a little PTFE tape (plumbers tape) on the connectors if you need to and trimming is not an option. Also - to check where the leak is - try some washing up liquid on the area, close the valve and blow through the tube to see if you get bubbles.

just thoughts.
 

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The smell of freshly turned delrin is more powerfu
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3,173 Posts
The balanced bit is to let air back into the system.
It's a failure point and yours has failed.
I thought for the balanced bit to have failed the first non return one would also have to of failed. thinking it was unlikly for two to fail at the same time ???

"It also leaks when I am not 'plumbed in' and forget to tighten the screw"



David
 

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Nigel Hewitt
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7,142 Posts
I thought for the balanced bit to have failed the first non return one would also have to of failed. thinking it was unlikly for two to fail at the same time ???
Why?
If the pipe is full of fluid the failure of the air inlet will let fluid out. It doesn't have to be sea water making the damp patch.

I have yet to be convinced that balanced is either desirable or even useful. I know I have decried 'failure point counting' as a bad way to assess the performance of a system, it's too simple minded, but this seems to be one place where it might just be right.
 

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GUE Tech instructor
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1,072 Posts
Paul,

Check that the one way valve is working properly.

Take the side branch tube off of the plastic T. Blow into the check-valve - air should go in. Blow back through the other end - nothing should go back the other way. Try pushing a bit of water back into it too.

If you get a leak, it's the check valve.

You can get one from me, or easier still, go to an aquarium shop and show them what you've got, so to speak. They should have a replacement, it might not look like the original, but as long as it works...

If it's not the check valve, then look to the tubing, as others have suggested.

Rich
 

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The smell of freshly turned delrin is more powerfu
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3,173 Posts
Why?
If the pipe is full of fluid the failure of the air inlet will let fluid out. It doesn't have to be sea water making the damp patch.
It also leaks when I am not 'plumbed in' and forget to tighten the screw.
go on then what is it a weak bladder :)

David
 

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Irish Cave Diver in the making
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Discussion Starter · #17 ·
Thanks for all your help and suggestions. I 'think' I have found the problem after a bit of expert investigation and the use of a Stanley knife :)

Nigel, you mentioned that the balanced part was a failure point. Well, if we ignore the connection to the outlet valve and the connection to the sheath as both types have these, there are 6 more joins in the tube! I think that might qualify as a failure point.

I stripped back the plastic 'shrink wrap' around the area I though it most likely to be the problem, and found damp coming back up the last joint. This is the join after the one way valve, so would explain why I got cold wet when not plumbed in and warm wet when using the valve.

After a bit of messing about and asking a few so called 'specialist' retailers (those plumbing merchants know nothing), I got a roll of 'Self Fusing Silicone Tape' from B&Q which is used for emergency pipe sealing. It will work down to -50oC, so it should be OK for UK waters :)

I will have a go at wrapping the joint area up with this tape, and should find out tomorrow if it worked - lets hope so :redface:

Thanks
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Irish Cave Diver in the making
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3,241 Posts
Discussion Starter · #18 ·
It worked!

My silicon self fusing tape has apparently done the job. Actually, I was a bit concerned after I put it on, that it might get a but worn rubbing against my leg, so I put a bit of gaffer tape over the sealing tape to protect it.

Two dives today and both were dry, Mummy I didn't pee myself today, aren't I a good boy :D
.
 
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Registered
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Hi,
I think I have just fitted the same balanced pee valve to my suit. I got it from divingniknaks. Anyway mine also leaked and I think its the one way valve at fault. Got wet around the valve area as soon as I pee'ed, only opened the screw to go. Guess it could be a faulty batch of valves?

On another note, the sheethes I got also left my undercarriage covered in the sticky stuff after I removed it. Even after a couple of good scrubs my genitals were still a sticky ball of scrotum, pubes and willy.. Short of getting the turps out I just had live with it for a bit. Needless to say I recommend the clear sheethes not the latex ones, which I've had no problem with.

Cheers
John
 
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