yeah - just something easier/quicker/betterI must say this was not originally part of the plan as the keg washer is quite a bit different to something that you need to purge O2
As has already been pointed out the best way to purge o2 is to fill keg with sanitise to the brim then displace this with CO2. This is what myself and a number of the staff do here too. I am assuming the reason you dont like this option is you dont want to sit there waiting for the keg transfer to complete? Is that correct? Are you looking for an automated solution so you don't have to waste time watching sanitiser go from one keg to another.