How long should a 5lb CO2 tank last?

[snowcapt]

I think you may have a leak in one of you kegs. My gas lasts way longer than 5 kegs.

nope no leaks...I also use a lot of gas for other things...I always fill my kegs before I add beer. add to fermenter when racking things like that...plus if I bottle with my beer gun I purge each bottle as well...it adds up...I could see easily get 7or so kegs out of tank...also depends on how full they filled your tank...

Yeah, it does add up. I will have to keep track of it next time I switch my tank out. Kinda fuuny, I have to go to a place called: "Rocket Auto" of all places.

[captain carrot]

If you don't have any leaks it should last a long time. After you fixed all the leaks at your CO2 connections, check all your keg post o-rings. Take them off the posts and stretch them to reveal any cracks. These are your silent tank killers! If you haven't replaced them, do it.
Good Luck!