Kegs holding pressure?

What is the best way to isolate a leak from a keg? I had my two kegs hooked up at 12 psi and on day 3/4 when I went to check on them, the co2 tank was empty and the kegs had no pressure. I did have a leak from a faulty o-ring on one of the kegs gas posts that I had corrected. I will test the system again today when I get more co2 for other leaks (which I did in the beginning)

This is my first time kegging. I did not blast the kegs with 30 psi to seal the lids, could this have caused the pressure in the kegs to escape? Also, I do at this time only have a 20 oz. tank that I am using...sooo I am hoping that is enough for the two kegs only. I have searched for that answer on here and the answers are variable.

Thanks!

 

Mix up either a standard Star San solution, or some dishwashing liquid with water (50/50), put it in a spray bottle, and spray every connection - heavily - with the CO2 hooked up and set for something around serving pressure. If there's a leak it will grow bubbles (and not tiny bubbles, but big ones)...

Cheers!

 

20oz is plenty to carb and serve two corney kegs.

the above advice is good, however i would fill the kegs with beer, if they are already, or sanitizer or water, just so you dont waste too much CO2 pressurizing an empty keg to 25psi. then, pressurize it to 25-30 psi. leaks will be easier to find the higher the pressure is.

 

When I put my setup together I put the whole thing in my pool, regulators and all, and was able to find one leak. Fixed it and it's been leak free for several years now. Total submersion isn't the most practical or convenient method, but it's absolutely fool proof.

 

I could imagine sealing kegs with 30 psi may cause a leaky lid to seal, but then when you drop to serving pressure the lid might start leaking again. Hence, while the higher pressure is fine to check all the plumbing bits, I'd test the keg lids at serving pressure.

If you suspect you have a poor fitting lid, try sticking a dime under the feet of the lid bail as you lock it down. That will provide a bit more lift and help keep the lid sealed at serving pressure...

Cheers!