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Fine-tuning HX brew temperature
00:29 - 4 years ago
Excerpted from "How I Stopped Worrying and Learned to Love HXs" on Home-Barista.com: Notice how it sputters and spurts, then calms down to a steady flow right around the 24 second mark (Hint: use the single-pour spout rather than a double-pour spout to make the transition easier to discern). If the portafilter is loosely engaged, you can more readily hear the hissing of boiling water and steam—sound is a very accurate indicator of when the heat exchanger is cleared of overheated water. Flushing water out of the group until you’ve poured the same amount of "steady flow" water will give you the same starting temperature shot-after-shot. No fuss, no muss, and takes less than 30 seconds.
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