We made a cask cleaner by cutting the top off a 1/2 bbl and mounting a small sprayball sticking out the top. The other end of the pipe with the sprayball sticks out the side of the keg with a tri fitting. The last thing is a tri fitting welded to the bottom of the keg.
So the bottom of the keg feeds the line in on the pump. The sprayball gets hooked to the out. All we have to do to clean cornys instead of casks is add a T before the sprayball and connect a poly hose in that has a T to the male and female ball lock fittings. When cleaning you attach the fittings take the top off the corny and place it upside down over the sprayball. So your caustic and sanitize cycles are pumping through the sprayball all over the inside of the keg and it is also circulating through both the in and outlets of the keg as well. Everthing falls back into the bottom of the keg.
We started using this for cleaning casks and I realized with a extra hose and corny fittings it works perfect.
CBO "Chief Brewing Officer" / Zymurgist
Bluegrass Brewing Co
636 East Main St