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Old 09-21-2010, 06:01 PM   #1
jgoette
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Default BIAB Question

Hey ya'll,

Just picked up a 7.5 gal turkey fryer I would like to use to get started w/ BIAB...

What I was wondering is what is the biggest batch I could do in a 7.5 pot. Could I squeeze 5 gal batches out of it?

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Old 09-21-2010, 06:36 PM   #2
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Disclaimer: I did my first 2 BIAB AG batches this weekend. With 2.5 gallon Batches. See Below For my math on why 2.5 gallon batches.

I calculated a .12 gallon/pd grain absorption 10 pd grain recipe=1.2 gallons
My boil of rate for a good boil is 1 gallon/ hr add another gallon gallon
(My pot has a lot of service area)

Final numbers 1.2+1+5=7.2 gallons. Since all the water goes into a BIAB method. It was too close for me to try.

I did two 2.5 gallon batches of an APA and switched the hops. I will still have 2 cases of beer but two different APA to learn hop taste. A Chinook APA and an Amirillo APA.

Good Luck

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Old 09-21-2010, 07:19 PM   #3
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Can't quite understand your entire post...

I see the 1.2 gallons for absorption, 1 gal/hr, but "add another gallon gallon" does not compute.

Does this mean the biggest batch I can do with a 7.5 gal pot is 2.5 gal?

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Old 09-21-2010, 08:33 PM   #4
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It depends on the gravity. For my last BIAB 5 gallon batch, I started with about 8.5 gallons of water using about 14 lbs of grain.

You'll probably boil off a gallon in the hour and the grains (say 10 lbs) will soak up a gallon or so. That doesn't leave much space for boiling over. But I'm no expert.

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Old 09-21-2010, 08:42 PM   #5
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Mark 6.5 gallon level on the side of your pot with a center punch.
Fill to that level with strike water at adjusted temp. Add grains and mash for 60 min. Pull bag and rinse with 180* water until you get to the 6.5 gal mark. proceed as normal.
Have a beer and pat yourself on the back. You just did AG.

Bull

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Old 09-21-2010, 09:05 PM   #6
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Oh yea, I'd like to do the Aussie style BIAB, so no sparge of any sort... Sorry for not clarifying.

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Old 09-21-2010, 10:16 PM   #7
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Quote:
Originally Posted by bullinachinashop View Post
Mark 6.5 gallon level on the side of your pot with a center punch.
Fill to that level with strike water at adjusted temp. Add grains and mash for 60 min. Pull bag and rinse with 180* water until you get to the 6.5 gal mark. proceed as normal.
Have a beer and pat yourself on the back. You just did AG.

Bull
You forgot the have a beer section of your instructions, but otherwise these are solid instructions
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Old 09-21-2010, 10:24 PM   #8
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Quote:
Originally Posted by bullinachinashop
Mark 6.5 gallon level on the side of your pot with a center punch.
Fill to that level with strike water at adjusted temp. Add grains and mash for 60 min. Pull bag and rinse with 180* water until you get to the 6.5 gal mark. proceed as normal.
Have a beer and pat yourself on the back. You just did AG.

Bull

You forgot the have a beer section of your instructions, but otherwise these are solid instructions

I never forget that!!!!:

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Old 09-21-2010, 10:34 PM   #9
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Sorry for the confusion and redudancy of last post.

Total Boil Water Volume

5 gallons boil volume +1.2 gallons for grain absorption if 10lbs used + 1 gallon for boil off = 7.2 gallons total.

I did two separate batches due to closeness of a 7.5 gal kettle and wanting to experiment with different hops.

Bullinachinashop makes alot of sense with his method. Didn't think of that in the middle of battle.

In my process I did a "sparge". Some bloggers and some podcasters do a sparge on BIAB. Below is my process. I didn't take any readings for efficiency. I wanted to work on process and I didn't know how to calculate efficiency last weekend. I do now.

Process:

I mashed at 155-158 for 60 minutes.
Lifted grains to drain, then placed in an extra cooler.
When water reach 170-175 I tea bagged grains from cooler for 10 minutes in kettle and added any extra drained water from cooler.
After 10 min. Placed grain bag on a grilling rack above kettle to get any drippings.
Once wurt reached boil removed grain bag and proceeded as normal.

Hope this makes better sense. Next time I will take the time to do readings and figure out efficiency. I just want beer.

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Old 09-21-2010, 11:32 PM   #10
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Quote:
Originally Posted by bullinachinashop View Post
Quote:
Originally Posted by bullinachinashop
Mark 6.5 gallon level on the side of your pot with a center punch.
Fill to that level with strike water at adjusted temp. Add grains and mash for 60 min. Pull bag and rinse with 180* water until you get to the 6.5 gal mark. proceed as normal.
Have a beer and pat yourself on the back. You just did AG.

Bull

You forgot the have a beer section of your instructions, but otherwise these are solid instructions

I never forget that!!!!:
I stand corrected lol
Having a beer and heading back to reading comp 101
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