Originally Posted by mattjmac
It'd be easier, and far more simple to just buy a corny keg and change out your friend's keg coupler for a ball or pin lock connection. Sanke kegs need a special coupler to clean them and that alone would probably cost a bunch.
A standard "D" coupling can be used. Just remove the check valves ( #'s 2 & 10):
And then pump hot PBW solution into the beer out connection with the keg inverted. A decent submersible sump pump (Harbor Freight) will do a great job. The cleaner/sanitizer will spray across the bottom of the inverted keg and drain down the sides and back out of the gas in connection.
BTW: The same coupling can be used to fill the keg when it is ready.