I have rigged up my actively fermenting fermenter to two cornie kegs set up in sequence with the second keg’s in post running with a line out to a starsan bucket. Does anyone have an idea how long it might take to purge all O2 from the kegs (with CO2 replacing it)? I want to purge several cleaned and sanitized kegs in this manner, two at a time. The fermentation is rolling from a batch I made yesterday and I want to take advantage of the free CO2 as long as it might last in this active fermentation state (Omega Hot Head yeast, if that matters).
Thanks in advance - Cheers!