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Channeling: How do I solve it?
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Discussions > Espresso > Q and A > Channeling: How...  
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hamm
Senior Member
hamm
Joined: 22 May 2003
Posts: 530
Location: Kettering, Ohio
Expertise: I live coffee

Espresso: Alex Duetto (1st gen)
Grinder: Mazzer Mini
Vac Pot: I'm not that kind of guy...
Drip: From the faucet occasionally
Roaster: I buy from several
Posted Sat Feb 7, 2009, 9:17am
Subject: Re: Channeling: How do I solve it?
 

Thanks again! You've given me a tone of great information.  

I haven't checked the OPV valve, but the last time I had it descaled (about 6 mos. ago!) some tweaks were done to get it working properly.

It always surprises me that as soon as you do one bit of maintenance, you open up a can of worms.  But that's the added price for great espresso.  And it's worth it.

For the past few days, I've gotten better results by paying more careful attention to the grind, the tamp and the volume of coffee in the basket. I also got some Black Cat and it's pulled better shots than the Panama I had before that. (obvious reasons)  The espresso tastes great, not 'God Shot,' but decent, and they'll pull between 8.3-8.5 bars.  Not quite where it should be, but within the window.

I may go in soon and back down the P'stat a touch and look at the OPV and the fill valve.

I'll let you know when I solve it.

Hamm
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arpi
Senior Member
arpi
Joined: 8 Oct 2008
Posts: 583
Location: Baltimore
Expertise: I live coffee

Espresso: Expobar Brewtus III-R
Grinder: Compak Compak K10WBC -...
Drip: Chemex
Roaster: Quest m3 Fresh Roast Plus 8
Posted Sat Feb 7, 2009, 9:49am
Subject: Re: Channeling: How do I solve it?
 

You can try the sifter trick

I use it when I have to weight the coffee. When I weight the coffee, I disturb the distribution and some areas come heavier than others if I were to put the coffee from the dosser to the cup to the portafilter. All you need is a colander and a brush.

Sifter distribution

Cheers
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