Like others that ferment in corny kegs, I use foam control drops, remove the gas post fitting, and clamp a blow-off tube directly on the gas post threads. But after the yeast have calmed, or if I transfer to a secondary corny for dry-hopping, I prefer an airlock. The easiest, cheapest way I've found to use one is to turn a size 7 (standard) drilled carboy stopper upside down, press and turn it over the gas post threads, and then insert the airlock.
I also used this method in a no-chill brew to keep bacteria out as the wort cools and sucks air in, and was wondering what people think about the effectiveness of this. I know corny kegs are built to seal with internal pressure, but with keg lub and a decent fitting lid it seems like this setup would alleviate pressure enough that you wouldn't get air coming in around the lid. Any thoughts?
I also used this method in a no-chill brew to keep bacteria out as the wort cools and sucks air in, and was wondering what people think about the effectiveness of this. I know corny kegs are built to seal with internal pressure, but with keg lub and a decent fitting lid it seems like this setup would alleviate pressure enough that you wouldn't get air coming in around the lid. Any thoughts?
