The idea I had, but haven't yet tried, is to just drop a small, sanitized, submersible pump into the middle of my immersion chiller with the outflow pointed through the coils at the side of the kettle. The goal would be to simulate the whirlpool effect of Jamil's chiller without mucking about with plumbing, added external pump cost and sanitation complexity.I guess it all depends on what you have lying around for free sometimes. I got my pump free, then $5 in fittings and I had a pump/recirc chiller. I have seen pumps for $20-$30
What I haven't yet found is a cheap food rated pump. FWIW, I don't think the pump has to handle boiling temps because I could wait a couple of minutes for the high temperature delta between the wort and the chiller to knock down the temp to 140 or so before I drop in the pump. <edit>That said, a high temp pump would be nicer because of the risk of continued DMS production above 140.</edit>
Has anyone already tried this? Any opinions?