Yeah, you do have to reduce the boil vigor a bit but you also only have to run it long enough to get the coil up to 200F or so. Then you can stop the pump and let it sit.
So, just to be clear, at T-15 min I run the wort through and back into the kettle for about 3 minutes and then shut it down. Once I flame out, I turn the cooling water on, recirculate the wort into the kettle for a minute, then let it go into the fermenter.
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