Can co2 be to old

[codywatkins]

Getting a kegging system and a friend has an old co2 tank that is half full he is lettingm me have to use. He doesn't know how when he got it last filled. I was just wondering if the gas and tank would be ok to use as long as it's not leaking. The tank will need recertified when I refill it.

 

[quid_non]

Nope - the Gas is remarkably stable - no worries assuming the inside of the tank is rust free. Most are but inexpensive fillers may have some water vapor present. You will know when you get the tank re-certified or just exchange it for a different one

 

[Vale71]

Don't worry, that gas was probably already millions of years old when it was pumped in the tank, so it didn't really get much older in the meantime. As long as the tank had positive pressure than no contamination from the ouside is possible either.