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Old 02-24-2012, 01:28 PM   #1
Chaddyb
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Oct 2010
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Im picking up a turkey fryer, and im wondering if i can cram a 5 gallon BIAB batch in a 7.5 gal kettle, or if i should just suck it up and get a 10 gallon kettle or keggle?


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Old 02-24-2012, 01:33 PM   #2
RM-MN
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I've done it but the wort was half an inch from the rim when I stirred (carefully) in the last of the grain. This was on a 1.05 gravity batch so if you want a higher gravity batch the answer is no. You can modify the BIAB technique to do higher gravity batches if you have another pan or pot by doing a dunk sparge step or a pour through sparge.

The other option is to do a slightly smaller batch. I do 2 1/2 to 3 gallon batches in my 5 gallon pot too. In your 7.5 gallon pot you should be able to do a 4 to 4.5 gallon batch easily.



 
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Old 02-24-2012, 01:34 PM   #3
TromboneGuy
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I have an 8 gallon that works fine for BIAB. You just won't be able to get more than about 1.060 OG.

 
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Old 02-24-2012, 01:56 PM   #4
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Sure it can be done, but you will be living near the top of the kettle for both the mash and boil (Now that you have been warned). The rackers calculator here....http://rackers.org/calcs.shtml/ indicates that with 12 lb of grain at 2.2 qt/lb your total mash volume will be 7.5 gal. The grain will absorb about 1 gallons so you will be left with about 5.6 gallons pre boil. I would guess with the kettle filled to the rim during the mash you could get a bit more. To collect more wort if needed, you could do a dunk sparge of the bag in either another pot or a bucket.

 
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Old 02-24-2012, 02:13 PM   #5
Challenger440
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I do all the time, but I do a modified BIAB (ie I sparge). I pull the bag out and toss it in a bottling bucket. Then I sparge through the bottling bucket. It allows me to mash out properly and use a normal qt/lb level and I can hit those higher OG's if I desire.
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Old 02-24-2012, 02:49 PM   #6
Chaddyb
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I'm only planning on doing a couple 2.5 gallon batches to get used to AG, but if I can stretch it for a little while I would like to maybe do a basic wheat or brown 5 gallon batch to fill my kegs. I'm not gonna plan on using a 7.5 forever, it would just buy me some time till I get a 10gal + kettle. For anything real high gravity I will most likely only do 2.5 gal batches.
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Old 02-24-2012, 02:50 PM   #7
Chaddyb
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Quote:
Originally Posted by Challenger440 View Post
I do all the time, but I do a modified BIAB (ie I sparge). I pull the bag out and toss it in a bottling bucket. Then I sparge through the bottling bucket. It allows me to mash out properly and use a normal qt/lb level and I can hit those higher OG's if I desire.
I've thought about this too, but having never done it, I'm not sure how to calculate the water.
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Old 02-24-2012, 03:46 PM   #8
bschoenb
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yes;
I can't fit all my water in my kettle for my batch size either. So, I put in as much water as I can; I mash, lift the bag a bit and mash out. While the bag is hanging and draining over the kettle I start the boil and add the remaining room temp water needed for a full boil (about 1 1/2 Gallon).
I use Beersmith to calc all this out wrt strike water temp, grain weight, etc
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Old 02-24-2012, 04:05 PM   #9
Chaddyb
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Quote:
Originally Posted by bschoenb View Post
yes;
I can't fit all my water in my kettle for my batch size either. So, I put in as much water as I can; I mash, lift the bag a bit and mash out. While the bag is hanging and draining over the kettle I start the boil and add the remaining room temp water needed for a full boil (about 1 1/2 Gallon).
I use Beersmith to calc all this out wrt strike water temp, grain weight, etc
How far into the boil do you add the water?
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Old 02-24-2012, 04:08 PM   #10
bschoenb
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I usally add the water as my water is heating up before boil; that way I'm all mixed in and I can check my Pre-boil "calcualted" gravity prior to Boil so I know if I have to boil "viqourously" or slower to hit my target target OG


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