Get your HBT Growlers, Shirts and Membership before the Rush!


Home Brew Forums > Home Brewing Beer > All Grain & Partial Mash Brewing > BIAB newbie with a mash volume question
Reply
 
LinkBack Thread Tools
Old 10-15-2012, 08:33 AM   #1
andycr
Feedback Score: 0 reviews
Recipes 
 
Join Date: Aug 2012
Posts: 307
Liked 41 Times on 35 Posts
Likes Given: 20

Default BIAB newbie with a mash volume question

I'm a complete all grain newbie, and want to get into BIAB. I do 2.5 gallon batches in a 4 gallon pot. Can I mash with 2.5 gallons of water, remove the bag, then top up to the 3.2 gallons required to collect 2.5 gallons at the end of the boil? Is it a cardinal sin of all grain to top up, or will it not matter since I'm mashing with the full volume, and only topping up to cover evaporation losses?

If that's not kosher, will heating the top up water to 170 and sparging the bag as it hangs in the strainer work? (Though I don't think sparging is part of traditional BIAB (?) it may save me here...)

I'm pretty sure 3.2 gallons plus the grain bill won't fit in my pot, so I'm evaluating whether to get a bigger pot.

__________________
andycr is offline
 
Reply With Quote Quick reply to this message
Old 10-15-2012, 12:29 PM   #2
WoodlandBrew
HBT_SUPPORTER.png
Feedback Score: 0 reviews
 
WoodlandBrew's Avatar
Recipes 
 
Join Date: Oct 2012
Location: Malden, MA
Posts: 1,867
Liked 140 Times on 136 Posts
Likes Given: 59

Default

For BIAB on the kitchen stove your pot is fine. That's the same size batches and pot I use. You can fit up to ten pounds, but efficiency may suffer. Fill it with water one inch short of the top. After you later check the volume and add the difference. I like to do the addional water in a second pot as a dunk sparge, but as you said, that's not true BIAB.

recently I did a blog post on this:
http://woodlandbrew.blogspot.com/2012/09/biab.html

__________________

The 2nd edition is now available: Brewing Engineering
Woodland Brewing Research Blog Applied Science for Better Beer.

WoodlandBrew is offline
 
Reply With Quote Quick reply to this message
Old 10-15-2012, 11:00 PM   #3
andycr
Feedback Score: 0 reviews
Recipes 
 
Join Date: Aug 2012
Posts: 307
Liked 41 Times on 35 Posts
Likes Given: 20

Default

Thanks. Also, when you first boil wort in AG recipes, do you have the huge hot break foam-over you see with extract? None of the videos I've watched have shown that, but they may just have skipped over it. I'm hoping it doesn't foam much so I can boil closer to the top of the pot.

__________________
andycr is offline
 
Reply With Quote Quick reply to this message
Old 10-15-2012, 11:05 PM   #4
foraroundortwo
Feedback Score: 0 reviews
Recipes 
 
Join Date: Feb 2012
Location: Boise, ID
Posts: 5
Default

It depends on which beer you are making but yes, AG can boil over if you aren't careful. I've found higher gravity AG batches tend to boil over easier. Just have your pot holders ready

__________________
foraroundortwo is offline
 
Reply With Quote Quick reply to this message
Old 10-16-2012, 12:41 AM   #5
C-Rider
Senior Member
HBT_LIFETIMESUPPORTER.png
Feedback Score: 0 reviews
 
C-Rider's Avatar
Recipes 
 
Join Date: Feb 2011
Location: Wai, Hawaii
Posts: 2,632
Liked 138 Times on 117 Posts
Likes Given: 343

Default

Quote:
Originally Posted by andycr View Post
Thanks. Also, when you first boil wort in AG recipes, do you have the huge hot break foam-over you see with extract? None of the videos I've watched have shown that, but they may just have skipped over it. I'm hoping it doesn't foam much so I can boil closer to the top of the pot.
A small plastic spray bottle filled w/water can keep the boil over from happening. I have a digital thermometer w/an alarm you can set for any temp. I set it to say 208* and when the alarm goes off I grab my spray bottle and get ready.

As the wort begins to boil and rise toward the boil over point I turn down the heat a little and begin spraying water on the wort. Since doing this I've never had a boil over.
__________________

Kaiser Ridge Brewing
-------------------------
Fermenting: CoffeeDryStout
Fermenting" Irish Red Ale
Dry Hopping: German IPA
Bottle Conditioning: German Stout
Bottle Conditioning: Wai`anae Summer Ale
(N.English Brown)
Bottled in the refer: Maui Wowie(RobustCoffeePorter)
Bottled in the refer: Malahine Ale (Am Pale)
Bottled in the refer: Old Glory Am. Stout
Bottled in the refer: GermanImperialStout

C-Rider is offline
 
Reply With Quote Quick reply to this message
Reply



Quick Reply
Message:
Options
Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
BIAB kettle volume/sparging question WildOnions All Grain & Partial Mash Brewing 1 06-04-2012 07:44 PM
BIAB water volume question ylee21 All Grain & Partial Mash Brewing 1 02-26-2012 01:00 AM
First BIAB, water volume question GTaylor All Grain & Partial Mash Brewing 4 11-05-2011 02:41 AM
Need help with water volume for first BIAB partial mash de5m0mike All Grain & Partial Mash Brewing 12 02-26-2011 03:05 AM
BIAB Question: Grain and Water Volume limulus All Grain & Partial Mash Brewing 16 10-15-2010 09:52 PM



Newest Threads

LATEST SPONSOR DEALS