Posted Sat Apr 20, 2013, 4:35pm Subject: Re: Water dance question..
The portafilter does not have to be in place when flushing an HX. I flush based on the sound of the water coming from the group head. I've always done my flushing without the portafilter and get very consistent results.
I will try to get a video showing my Oscar after an hour or more of sitting idle. It is extreme from all over the place to a stream now that I have upgraded the thermosyphon. Before it took a long time and harder to see the change. Now that it is doing it in less than half the volume of water it is crystal clear when the super heated water is purged.
Buying advice: GRINDER GRINDER GRINDER. Don't cheap out on the grinder.
hmm. It seems I've never read the H-B page on HX machines properly, as that says to do it with the PF in place.
Doing the flush with the PF in place seems wrong, at least on my machine - firstly the water dance doesn't produce any splashing on my machine, so there's no safety issue. Secondly, the flush flushes out debris from the last shot - into the PF, which then needs to be cleaned out again. Thirdly, the HX recovery time is pretty short, so you've only got 30s to clean, dry, fill, distribute and tamp the basket after the flush - way too short to do a decent job of WDT and tamping for me first thing in the morning! Most importantly, the water dance on my BZ07 is very quiet because the group runs colder than brew temperatue - I can't hear it if the kettle or stove is boiling water nearby, so I'd never hear it with the PF in place.
I guess the difference between the BZ07 and the various E61 dragons is important here - the group on the BZ07 idles below brew temperature (about 170-180F or so, I think), so the water dance is much less violent than on a machine with the group running closer to the boiler temperature.
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