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After using, then cleaning a keg with PBW, what is the best way to store the cleaned keg? I may not use the keg for a while, and I would like to avoid mold growing in any residual water (for example).

Should I: sanitize after cleaning? store with the lid off to encourage drying? something else?

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up vote 10 down vote accepted

After cleaning (I use PBW also, occasionally Oxiclean) I turn the keg upside down and let it dry overnight. Then I put the lid on and pressurize to 10 psi. That serves 2 purposes. First, the CO2 helps prevent things from growing in the keg. Second, when I'm ready to use the keg, I pull the pressure relief valve. If there's not still pressure on the keg, I know that it's leaky and needs to be repaired before I use it.

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I like the pressure-testing technique! – Hopwise Oct 6 '11 at 20:04
Do you also purge the keg with CO2? – Dustin Rasener Oct 7 '11 at 0:26
When I fill it, yes. But I store it with CO2 in it, as I said in the post. – Denny Conn Oct 7 '11 at 2:08
Sorry, I meant to ask whether you purge the keg of air before pressurizing and storing it. – Dustin Rasener Oct 7 '11 at 21:52
Nope, not necessary since there's nothing in there to make me worry about oxidation. – Denny Conn Oct 8 '11 at 15:48

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