Detecting c02 leaks

[sleepyjamie]

Got a new 5lb tank filled and its gone in less than 3 weeks. So looks like I have a leak somewhere. I can see or hear and leak, and it obviously took a long time to go dead. Any ideas?

[mr x]

Soapy water around all connections. You do have the regulator gasket in place? Usually a white plastic washer.

[Cheesehead]

I ran through a tank in even less time a couple of months ago. I had to replace the regulator.

[Jimmy]

I was losing c02 from the pressure relief valve on one of my kegs.

[GAM]

Soapy water around all connections. You do have the regulator gasket in place? Usually a white plastic washer.

I use a star san spray and found a bad pin lock fitting. It had cracked at the metal/plastic joint. I put some pl plus on it and I hope to use it for cleaning.

Sandy

[dexter]

I used soap as well to find that one of my pins was stuck open. Also when I smashed my regulator a while ago I had a tank last about 9 days...

[BrooklandBrewer]

I had a leak in my pressure relief valve too. Also check your clamps maybe??

[chalmers]

I'll give you the same advice I gave Cheesehead:

Start by simplifying the system, remove the kegs from the system. Tank+regulator+gas connections+quick disconnects.
Open the tank valve, turn the regulator up to 50psi. Close the tank, don't touch the regulator, and wait overnight (if it's bad, you may not have to wait that long). It should not creep more than a few psi either way.
If it creeps, you have a bad tank valve, gasket, regulator, hoses or QDs.
Simplify the system further: remove any splitting you are doing in your gas line, and just use one QD.

If the system doesn't creep overnight, great, your gas delivery is probably OK! Concentrate on your kegs (though the issue could still be a bad QD leaking AFTER the pin).
Hook up one keg, pressurize it to 30psi, close the tank, and wait overnight again. Repeat with your different kegs until you find a winner (loser).

Only after you've narrowed it down would I bother with soapy water.

This is what I do with $200k instruments, so it'll probably work with your setup too. You can change the pressures I've suggested, but you want them to be high enough that a problem will be obvious.