Do you have to fill it for this to work?With sanitising you can completely fill the keg and then use CO2 to empty the keg giving you a sanitised keg purged of air.
For purging all the air to work properly, yes. If you mean for cleaning to work, no.Do you have to fill it for this to work?
I've heard that but to be honest I am not smashing through them that quicklyGet yourself a bucket blaster, easiest way of cleaning multiple kegs.