Marcus -
Glad this helped. It perplexed me for a while.
The O2 in the feed water will definitely affect the extraction
process by oxidizing the volatiles that give you flavor.
If you want a fantastic smooth espresso blend try this:
http://www.anticanyc.com/Pages/Coffee.asp
Chris
On 6/26/2014 2:41 PM, Marcus Mininger wrote:
Chris,
This seems to have done the trick. Thanks! I tightened down the
clamp around the rubber connector b/t the line in and the pump a bit
harder than before. Then I ran the pump with the hose out of the
reservoir to drain the boilers until the pump was clicking. When the
boilers were fairly empty and the pump had been clicking for a minute
or so, I put the in-take hose back in the reservoir, re-primed the
pump, and refilled the boilers. Should that be sufficient for getting
the air out of the pump?
So far I've had no more sqwarking for several days.
I'm also hoping that this fix has improved the taste I was getting in
my espresso. For a while (basically coterminous with when I had more
frequent sqwarks) I had been getting a very strong tannin-like flavor
in the cup along with an absence of the natural sweetness and
high-tones that should be in the beans I was using. Now that I've
eliminated the sqwark, so far I don't taste the foreign tannins
anymore, though I'm waiting for some better beans to arrive to test it
and know for sure.
Espresso is improving = spirits are up!
Thanks again,
Marcus
On Sunday, June 22, 2014 9:26:25 PM UTC-5, Sludgemaster wrote:
Same think happened to me when I retrofitted with a rotary pump.
It is caused by air in the feed water. Prime the pump and make
sure that there is no air leak in the hose feeding the pump.
Chris
On 6/21/2014 9:38 PM, Marcus Mininger wrote:
I have this same problem, though I have not measured a drop in
pressure (either on the pressurestat or with an external brew
pressure gauge). It does mainly happens if the pump has to work
hard, like on a tight slow pour, and it might sqwark (a pretty
good word for the sound, BTW!) once total or once every couple
seconds for part of the pour. I'm not mechanical, but the
frequency and sound make it seem like a sqwark per revolution of
the internal mechanism on a rotary pump.
The problem started happened infrequently maybe a year ago and
has gotten more frequent since. But part of the trouble in my
case is that I just replaced the pump maybe 2 years ago with
parts and instructions from WLL. I'm wondering: is it possible
that I installed something incorrectly that led to this so soon
after replacing? Or does that sound like a bad part? And either
way, what to do now?
Marcus
On Saturday, May 10, 2014 2:57:11 AM UTC-5, jhgumbrell wrote:
Just to be clear...it happens if I'm doing a tight slow pour.
Machine HSS only just started to react like this
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