Leak irritation...an itch I can't scratch!

GarryL

Well, after 2 full seasons of hard use, I've developed a small, irritating little leak somewhere on my unit. On negative test in a quiet room I can hear a gentle plupp, plupp, plupp noise when I put my ear to the loop. No obvious sea water getting in on a dive other than the normal gloop in the exhale lung but the unit now 'only' holds negative test for a few minutes and then ever so gradually loses it, as opposed to holding it indefinitely before. I've already serviced the mouthpiece, checked the hose Jubilee clips for tightness and looked for obvious loop/lung damage. I'm now suspecting the diaphragm/spring mechanism on the exhale counter lung dump valve? Any other suggestions or similar experiences?

Garry

4ster

I had a negative test leak at the BC inflator. Leak was through the reg for the onboard dil. Everything worked when pressurized but with the cylinder valve off it would not hold a negative.

__________________
Steve
"My problem is that I have trouble reconciling my gross habits with my net income." Errol Flynn

jkaterenchuk

I have a similar issue and its a small leak at the interface between the DL T fitting and the shiny plastic round gasket on the fabric. Only noticeable when doing a negative test. Could only find it when doing a negative check with wet CL's and my ear clse to the T when sucking it negative.

John

GarryL

Thanks John,

Sounds like a similar problem and I'll take a closer look at the joint between the fabric and plastic on the counter lung.

Skipbreather

After over 4 years w/ mine, I'm well acquainted w/ "flup, flup, flup" sound. Spent a lot of time chasing it. Finally stopped when I replaced both the mushroom valves AND their holders in my BOV.

Note: I have a custom BOV I designed & built myself.

Ken

divetheworld

I manage to find nearly all of these irritating items using washing up liquid solution and pumping the loop right up. Leaks show up as small bubbles.

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Philippe GERIN

Last time I had such an irritating small leak, that was the o-ring at the first stage side on the ADV hose.
Best
Philippe

jojo l'affreux

I met such problem several time. It seems there could be a leak on T pieces.
But finally, by cleaning DSV and lubrificating cylinder inside, all went good.

Frank.

diverreb

Those types of leaks, while annoying, are not cause for concern. A lot of DSV's blup like that. It used to drive me nuts before I switched over to a BOV.

Then all was good, until I put longer hoses on my unit, which required some creative sealing solutions. Then an ever so tiny and slow leak on Negative Check showed up. I live with it.... It doesn't effect any function on the unit and no water shows up after dives...

The purpose of the negative test is to show if there is a major problem in the sealing of the unit, so it doesn't flood. That type of leak shows up as the hoses dropping in a pretty obvious manner.

Holding the negative for a few minutes then an ever so slow dropping of the hoses isn't a problem.

Richie

GarryL

Thanks Philippe,

Sounds like another prime candidate for me to check/swap.

Best

Garry