Quote Originally Posted by brewercm
I've seen it done in a refridgerator. The hose is coiled up into a large container of water that is kept in the refridgerator. They drilled two holes into the side of the fridge for the inlet and outlet of the hose to go and just sealed it off, you could probably use any sealant to do this and I'd seal from both inside and outside.
I helped to make a keg machine like that one time. I think that after all the experimentation, it might be cheaper to just buy a chiller.