I have a submersible pump for re-circulating ice water through the IC chiller.
Looking at it one day AND a pile of kegs I said "self, there's got to be a better way"
Tube here , QD there, T here and voila!
Now I take the lid off the corney, stick it in a big pot containing the pump and some Oxyclean solution.
Start up the pump and run Oxyclean into the QD's on the IN/OUT of the keg
Once the keg is full I disconnect the gas post and let it run in the bottom of the keg via the BEER POST and out the top of the keg.