Slight co2 leak

[Gusmedic]

Since there aren't enough of these threads....I've been fooling myself I don't have a leak and was just a problem of small tanks, but my 20lb tank just was empty this morning after 4 months and only maybe 4 kegs previously I just sprayed star san and saw no bubbles so I called it good.
After empty tank I put gas lines in cup of water and found one small leak which I tightened. Then I used a very thick solution of soap and water and brushed it on everything (all over regulator and all possible sources from keg) and found no other leak. So last night I turned off gas, and shut off valve to each keg. This morning when I turned on gas and each shut off valve a decent amount of gas went into each keg one at a time. So does this confirm both kegs still have a leak? Both have been on gas for a month or more. Any advice would be appreciated. I do plan on on disconnecting from gas and placing each keg in a tub of water to check that way.

 

[jekeane]

What psi do you serve at? I have at least one keg that the kid won't seat properly below 8ish psi.

 

[jekeane]

I'm not certain of this but when you turn off the gass to the kegs. The gas in the keg will continue to go into solution when the beer is cold. I often unhook kegs in my kegerator that have been carbonated and when I hook them back up they take on some gas.

 

[day_trippr]

^That^ is totally true if the beer carbonation has not reached equilibrium given the temperature and CO2 pressure.
The only solid way to test a keg is when it is empty.

[...]I do plan on on disconnecting from gas and placing each keg in a tub of water to check that way.

That would save you a lot of time, aggravation and gas - once the keg is empty.
If you have some duct tape - or even masking tape - you can build a pond atop the keg, fill it with sanitized water with the gas disconnect attached, and see if there are any bubbles...

Cheers!