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carz07
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carz07
Joined: 20 Oct 2012
Posts: 211
Location: Philippines
Expertise: I live coffee

Espresso: Breville Dual Boiler
Grinder: Baratza Vario, Bodum Bistro,...
Drip: V60, Phin, Bonmac, Ame. Drip
Posted Mon May 13, 2013, 7:58pm
Subject: Re: pressure readings
 

BubbaDude Said:

I've never done it, so your guess is as good as mine. You might try taking the skin off an looking inside with a bright light. If it's damp inside, that's a clue.

Posted May 13, 2013 link

oh so the leak should be inside, i thought what you mean by the leak is that the water comes out form the drain even when its not suppose to come out yet, ok i will check the back

 
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carz07
Senior Member
carz07
Joined: 20 Oct 2012
Posts: 211
Location: Philippines
Expertise: I live coffee

Espresso: Breville Dual Boiler
Grinder: Baratza Vario, Bodum Bistro,...
Drip: V60, Phin, Bonmac, Ame. Drip
Posted Mon May 13, 2013, 9:15pm
Subject: Re: pressure readings
 

just came to my head, a bit related since its pressure

if the coffee is still fresh roasted it means it is still gassing out - should the gauge read a high pressure or low?
since this is an opv, correct me if im wrong, it regulates the pressure in a way it adjust to the pressure of the puck. since there is much resistance from the coffee due to its gassing out, then the pressure will lower itself. sort if balance itself?

 
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BubbaDude
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BubbaDude
Joined: 8 Jan 2011
Posts: 535
Location: High in the Rockies
Expertise: I love coffee

Espresso: Breville Dual Boiler
Grinder: Baratza Vario
Vac Pot: Yama
Drip: Clever Coffee Dripper
Roaster: Hottop 2KB
Posted Mon May 13, 2013, 11:00pm
Subject: Re: pressure readings
 

carz07 Said:

oh so the leak should be inside, i thought what you mean by the leak is that the water comes out form the drain even when its not suppose to come out yet, ok i will check the back

Posted May 13, 2013 link

If there is a leak, it could be anywhere.

 
"I've Scaced many HX/E61 machines, seeing shot variances of up to 8-10F or more. [The BDB] stays within 1F." - Mark Prince
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carz07
Senior Member
carz07
Joined: 20 Oct 2012
Posts: 211
Location: Philippines
Expertise: I live coffee

Espresso: Breville Dual Boiler
Grinder: Baratza Vario, Bodum Bistro,...
Drip: V60, Phin, Bonmac, Ame. Drip
Posted Mon May 13, 2013, 11:08pm
Subject: Re: pressure readings
 

BubbaDude Said:

If there is a leak, it could be anywhere.

Posted May 13, 2013 link

i will open the back later when i get to the house and will update

 
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OttoMatic
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Joined: 24 Feb 2013
Posts: 78
Location: Colorado
Expertise: I love coffee

Espresso: Brewtus IV-R
Grinder: Mahlkönig K30 Vario,...
Drip: Capresso MT500+
Roaster: Cast iron dutch oven
Posted Tue May 14, 2013, 4:55am
Subject: Re: pressure readings
 

carz07 Said:

i will open the back later when i get to the house and will update

Posted May 13, 2013 link

I'd think that if you are reading different pressures when using a backflush blank with a single wal basket vs. a dual wall basket that the problem would be at the seal, the blank, or somewhere around the grouphead.  Of course anything is possible, but I don't see why changing something at the grouphead would cause something internal to fail/not fail.  Right?
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carz07
Senior Member
carz07
Joined: 20 Oct 2012
Posts: 211
Location: Philippines
Expertise: I live coffee

Espresso: Breville Dual Boiler
Grinder: Baratza Vario, Bodum Bistro,...
Drip: V60, Phin, Bonmac, Ame. Drip
Posted Tue May 14, 2013, 5:07am
Subject: Re: pressure readings
 

carz07 Said:

i will open the back later when i get to the house and will update

Posted May 13, 2013 link

no leaks found, no drip

 
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carz07
Senior Member
carz07
Joined: 20 Oct 2012
Posts: 211
Location: Philippines
Expertise: I live coffee

Espresso: Breville Dual Boiler
Grinder: Baratza Vario, Bodum Bistro,...
Drip: V60, Phin, Bonmac, Ame. Drip
Posted Tue May 14, 2013, 5:13am
Subject: Re: pressure readings
 

OttoMatic Said:

I'd think that if you are reading different pressures when using a backflush blank with a single wal basket vs. a dual wall basket that the problem would be at the seal, the blank, or somewhere around the grouphead.  Of course anything is possible, but I don't see why changing something at the grouphead would cause something internal to fail/not fail.  Right?

Posted May 14, 2013 link

JMFishtown said the using the dual wall creates more pressure and this is true im getting a 9.5bars and with single wall, it hits the 9.5 and then drops to a steady 8bars

my question is it normal for the single wall to hit 9.5bar and then drop to a stead 8bar using the blind at single wall?

 
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OttoMatic
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Joined: 24 Feb 2013
Posts: 78
Location: Colorado
Expertise: I love coffee

Espresso: Brewtus IV-R
Grinder: Mahlkönig K30 Vario,...
Drip: Capresso MT500+
Roaster: Cast iron dutch oven
Posted Tue May 14, 2013, 6:52am
Subject: Re: pressure readings
 

carz07 Said:

hi guys please do inform me if regarding this

using single shot dual wall with blind filter - pressure reads 9.5 and steady
using single shot single wall with blind filter - pressure hits 9.5 and then drops to 8bars steady

is there any problem with the machine?

Posted May 11, 2013 link

But you're doing this with a blank in either of those baskets, right?  I would expect the same pressure if everything else is equal (i.e., the're not a hole in one of the baskets, a problem around the lip such that you don't get a good seal, etc.).  I don't think that single wall vs. dual wall will make any difference if you have a blank in the bottom of it.
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carz07
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carz07
Joined: 20 Oct 2012
Posts: 211
Location: Philippines
Expertise: I live coffee

Espresso: Breville Dual Boiler
Grinder: Baratza Vario, Bodum Bistro,...
Drip: V60, Phin, Bonmac, Ame. Drip
Posted Tue May 14, 2013, 7:15am
Subject: Re: pressure readings
 

OttoMatic Said:

But you're doing this with a blank in either of those baskets, right?  I would expect the same pressure if everything else is equal (i.e., the're not a hole in one of the baskets, a problem around the lip such that you don't get a good seal, etc.).  I don't think that single wall vs. dual wall will make any difference if you have a blank in the bottom of it.

Posted May 14, 2013 link

same for both, only difference is that the other single and the other is dual

what do you mean by "lip"

 
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JMFishtown
Senior Member
JMFishtown
Joined: 18 Jan 2013
Posts: 38
Location: Philadelphia
Expertise: I love coffee

Espresso: Breville Dual Boiler
Grinder: Compak K3 Touch
Drip: Aeropress, Espro Press
Roaster: Behmor 1600
Posted Tue May 14, 2013, 7:16am
Subject: Re: pressure readings
 

If the blank is getting a good seal then it would not matter; It's just easier to get a good seal with the blank using a dual wall basket since there is less surface area the blank needs to cover.

There really are only so many places it can go wrong; I'd run 5 back flushes with the blind in the dual wall single basket and hold them for 10ish seconds and watch the pressure. If it hits 9.5 Bar or 10 Bar and stays steady I don't think there's anything wrong with the pump or OPV

Also listen when pulling a shot do you hear water from the 3 way valve coming into the drip tray?
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