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Home Brew Forums > Home Brewing Beer > Beginners Beer Brewing Forum > Strike Water/Sparge Water Table for BIAB - Am I correct?
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Old 06-04-2012, 08:32 PM   #1
scottvin
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Default Strike Water/Sparge Water Table for BIAB - Am I correct?

I do all-grain BIAB and I have been trying to make a quick and easy table to figure out how much strike and sparge water I need. I want to end up with 5.5g in the fermenter. Here is what I have come up with:

Constants
Headspace .25g
Grain Absorption .5g (I know this varies but this is usually what I get)
Boil Off 1g
Quart of water per Pound 1.5

Strike/Sparge Table

Code:
Grain LB	Strike Water	Sparge Water
8		3		4.25
9		3.5		3.75
10		3.75		3.5
11		4		3.25
12		4.5		2.75
13		5		2.25
Example - 10 Pounds of Grain:
3.75g strike water
.5g grain absorption
.25g headspace
3.5g sparge
1g boil off

5.5 gallons into the fermenter
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Old 06-04-2012, 08:41 PM   #2
tre9er
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My absorption with BIAB was 0.11g/lb. of grain. Now with braid mash-tun it's 0.19. Don't forget boiloff is only part of the loss in the BK. Hop absorption and trub loss are part of it. I start with 6.75g. in the BK preboil to end up with 5.25 in fermenter. I had more hops Saturday and ended up short because I didn't up the preboil volume accordingly.

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Old 06-04-2012, 09:42 PM   #3
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Do you squeeze the bag after the mash?

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Old 06-04-2012, 09:50 PM   #4
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Quote:
Originally Posted by scottvin View Post
Do you squeeze the bag after the mash?
Yes, a lot. That's why the absorption is much lower with BIAB, for me.
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