How long does 5lb CO2 last?

[cruizer8]

I have just recently gotten into kegging and am wondering how many kegs I can figure on carbing and serving on a 5lb tank. I just ran my tank empty yesterday with only going through 2 kegs. Is that normal, or should I expect it to last longer?

From what I can tell, I don't have a leak, but maybe I have a small one somewhere.

 

[keggert]

You have a leak. When I first set up my system I went through a bottle inabout 24 hours. Now I have everything sealed my bottle has lasted several kegs and the needle hasn't moved

 

[Rockn_M]

Sounds like you have a leak.

I've been able to carb and push about 15, maybe 20 kegs with 1 5lb co2 tank.

Check all connections by spraying Star San on all connections and look for bubbles. Be sure to check the regulator, ball\pin locks, around poppets and any O-rings.

It can be tedious to try to find the faintest leak, which sounds like you have, but worth it once you find it.

 

[zachattack]

I've been able to carb and push about 15, maybe 20 kegs with 1 5lb co2 tank.

That's very impressive! OP, the general rule of thumb is 1-2 kegs per pound of CO2, and twice that if you're naturally carbing. It depends on your preferred serving temperature, amount of purging, etc. But I agree that you most likely have a very slow leak.