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Old 05-28-2011, 02:40 PM   #1
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Default "Dead space" under the false bottom...

Brewing my first AG this morning Question: Regarding amount of strike water... If it is calculated that I am to use 14 quarts, does this include the space under the false bottom or do I add 14 quarts in addition to this "dead space"?

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Old 05-28-2011, 02:44 PM   #2
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Brewing my first AG this morning Question: Regarding amount of strike water... If it is calculated that I am to use 14 quarts, does this include the space under the false bottom or do I add 14 quarts in addition to this "dead space"?
If you didn't account for it in the software you're using, you'll probably want to add extra water.
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Old 05-28-2011, 02:45 PM   #3
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I guess this is related,but I included the bottom part with the total. My wife steeped her grains in a bag on top of a cake cooling rack I put in the bottom to keep it off the hot kettle base. Even with a "false bottom",It seems to me there would be some small amount of movement.?...
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Old 05-28-2011, 02:49 PM   #4
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Brewing my first AG this morning Question: Regarding amount of strike water... If it is calculated that I am to use 14 quarts, does this include the space under the false bottom or do I add 14 quarts in addition to this "dead space"?
The water to grist ratio is extremely non-critical. Don't sweat it either way. Just focus on hitting your desired pre-boil volume in the kettle.
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Old 05-28-2011, 02:49 PM   #5
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You only need to account for the dead space once. When you mash in you add x ammount of water. Then you drain that out leaving behind what's left in the dead space. When you add more water, the dead space is full so you should get out as much as you add. Either way, unless you have a gallon of dead space, it will be close enough that it shouldn't really matter.

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Old 05-28-2011, 02:51 PM   #6
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i suspect i will have to reduce the temp of the strike water then, eh? its calculated at 172 but with an additional 3 quarts... well... now it's kind of a crap shoot...?

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Old 05-28-2011, 02:52 PM   #7
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I guess this is related,but I included the bottom part with the total. My wife steeped her grains in a bag on top of a cake cooling rack I put in the bottom to keep it off the hot kettle base. Even with a "false bottom",It seems to me there would be some small amount of movement.?...
I'm not following your question... What movement are yo talking about?

Typically, you will mash at a ratio somewhere around .1.5 quarts of water per pound of grain. If you don't add extra water to account for dead-space under the false bottom, you will end up with a "thick" mash.

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Old 05-28-2011, 02:52 PM   #8
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I guess this is related,but I included the bottom part with the total. My wife steeped her grains in a bag on top of a cake cooling rack I put in the bottom to keep it off the hot kettle base. Even with a "false bottom",It seems to me there would be some small amount of movement.?...
For steeping, it doesn't matter. We're talking about the water to grist ratio for mashing to optimize enzymatic reactions.

Once you account for the deadspace once, you're all set.

Remember that the deadspace is still technically part of the mash, and the deadspace probably isn't that much.
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Old 05-28-2011, 02:54 PM   #9
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The water to grist ratio is extremely non-critical. Don't sweat it either way. Just focus on hitting your desired pre-boil volume in the kettle.
I agree, but it will depend on the amount of dead space... if it were large enough, the top of the grain bed could be dry.
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Old 05-28-2011, 02:58 PM   #10
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I know what y'all are talking about,yooper. I was just musing that,the false bottoms I've remembered seeing had some kind of holes/vents,whatever in them. So I figured the liquid would have to move through do to heat convection. yes,no? and steeping is different from mashing,insomuch as the amount of water is concerned,etc. But kinda the same. Just trying to pick up another peice of brewing with grains...
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