HomeRoast Digest


Topic: Water Boiling??-Lower Bowl (8 msgs / 126 lines)
1) From: Bill Thomas
I hope to eventually learn the art of making Vacpot coffee.  Surely first you need to know the science.  This morning I heated the water in the lower bowl to 205 and attached the funnel.  I had the electric heat at a tad above medium and reduced it to low.  The water in the lower bowl seemed to boil.  The greatest agitation was at the bottom of the tube.  This continued even when I removed the pot from the heat source and the trip south started.  Intuitively, you would think this is bad for your coffee to encounter seemingly boiling water.  I understand that the water in the top bowl is not actually boiling but being agitated by the steam.  How about the water in the bottom?  Can someone help me out on this issue!  Thanks again.
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2) From: jim gundlach
Bill,
     It sounds like you may not quite have a solid seal between the 
bottom pot and the outside world.  The pressure that holds the water up =
north should not decline until the boiling has stopped.  As long as you =
have boiling going on, you are adding evaporated water to the 
pressurized chamber.
Jim Gundlach
On Friday, January 10, 2003, at 07:53 AM, Bill Thomas wrote:
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3) From: Mark

4) From: Bill Thomas
Mark, Thanks for your response.  Your clarification is what I needed to hear in order to maket sure I was proceeding correctly. 
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5) From: Ben Treichel
Good, but what is the situation that you are experiencing?
Curious,
Ben
Bill Thomas wrote:
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6) From: Bill Thomas
Ben, I am trying to reply to your question on my post.  I am an "old boy" and trying to learn how to make coffee and work this computer at the same time.  I am afraid that I am not being too successful at either.  I apologize.
I am new to the Vacpot.  This morning I preheated the water, poured into lower bowl, heated on electric stove at medium+ heat to 205 degrees.  Seated funnel and lowered heat to low.  The water in lower bowl began to boil pretty good.  I guess I had not had it this hot before.  When the brew headed south it still seemed to have tiny bubbles in the bowl.  I was looking for some reassurance that this was normal or satisfactory.  Mark's post did just that.  Thanks to all for the help.  I try to do better on the computer next time.
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7) From: Ben Treichel
Suggestion,
Keep on preheating like you do, pour the water into the bottom with the 
burner on high. When you see the first small bubble put the top (or 
north section) on. Leave the burner on high until all of the water moves 
north (that is all of the water that is going to go north). Then turn it 
 down to around 4 out of 10, and wait two minutes. Move the pot to a 
cold burner, and watch it head south.
This is what I do. I monitored the temp in the upper bowl and was 
surprised by how much temperature was lost going from south to north. 
Thats when I came up with the method I use now.
Ben
Bill Thomas wrote:
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8) From: jim gundlach
It is quite normal for small bubbles to be present on the surface of a =
pot at below boiling temperatures.  Watch the pot as it gets hot.  You =
will be able to see small bubbles at temperatures below 180F.
Jim Gundlach
On Friday, January 10, 2003, at 02:18 PM, Bill Thomas wrote:
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