leaky valve

[JustJoe]

Thanks in advance for the advice.

I have a valve (Ocean Dynamics k-valve) that I noticed leaking gas after my last dive. I changed the o-ring and it is still leaking, very slightly but I can see the bubbles. So, what next? The valve did not look damaged. No distinct marks in the metal and the new o-ring doesn't look damaged. What else should I look for to fix this?

Regards,

Joe

 

[teknitroxdiver]

Where was the gas leaking? If it was at the neck of the tank then it's the seal between the valve and tank, not the valve-to-reg seal. If it was the other end of the valve (the valve-to-reg seal) that was leaking, check to make sure that you don't have the reg a little off-center on the valve, and that the part on the reg that seals against the o-ring in the valve isn't nicked or anything.

 

[JustJoe]

The leak was between the regulator and valve. I also tried it (my reg) on my other tank and it worked fine, no leaks. This made me assume that the problem was with the valve. I will check the regulator's seal area.

Joe

 

[Leadking]

if the valve is leaking from the outlet the seat is wore out
if it is leaking from where the tank meets the valve it may be an o-ring or a cracked cylinder