BIAB water displacement? - Home Brew Forums
Home Brew Forums > Home Brewing Beer > BIAB Brewing > BIAB water displacement?

Reply
 
Thread Tools
Old 01-22-2013, 01:24 AM   #1
Tipharet
Recipes 
 
Jul 2012
Eugene, Oregon
Posts: 51



Tomorrow I am going to brew my first all grain using the BIAB method. I have an 8.5 gallon kettle and 20 lbs of grains total. I am curious how I would calculate water displacement?

I think I can mash with 6 gallons of water and still have 2.5 gallons of volume available for water displacement. My other option would be to mash with 4 gallons of water and sparge with 2.5 gallons of water.

What do you guys think? I don't really want to sacrifice much efficiency in either methods.



 
Reply With Quote
Old 01-22-2013, 01:29 AM   #2
Yooper
Ale's What Cures You!
HBT_ADMIN.png
 
Yooper's Avatar
Recipes 
 
Jun 2006
UP of Michigan, Winter Texan
Posts: 69,045
Liked 7616 Times on 5360 Posts


Have you seen this mash calculator? http://www.rackers.org/calcs.shtml (Scroll down a bit to "can I mash it")

It will tell you how much grain and water fit in a vessel. In this case, 20 pounds of grain and 1.25 quarts of water per pound of grain (6.26 gallons of water) will take up 7.85 gallons of space.


__________________
Broken Leg Brewery
Giving beer a leg to stand on since 2006

 
Reply With Quote
Old 01-22-2013, 01:30 AM   #3
gypsyhead
HBT_LIFETIMESUPPORTER.png
Recipes 
 
Oct 2010
I've Been Everywhere Man, Tough Question
Posts: 188
Liked 1 Times on 1 Posts


Generally agreed figure seems to be equivalent to around 0.36qt (volume) per pound (weight) of grist. Other figures run around "Uncrushed malted barley is about .75L/# dry. Malted wheat is about .65L/# dry."

http://www.homebrewersassociation.or...p?topic=8568.0
__________________
Gypsy Head Brewing Company
"I promise never to drink any more... but just as much." - Buster Keaton

 
Reply With Quote
Old 01-22-2013, 01:31 AM   #4
Tipharet
Recipes 
 
Jul 2012
Eugene, Oregon
Posts: 51


Quote:
Originally Posted by Yooper View Post
Have you seen this mash calculator? http://www.rackers.org/calcs.shtml (Scroll down a bit to "can I mash it")

It will tell you how much grain and water fit in a vessel. In this case, 20 pounds of grain and 1.25 quarts of water per pound of grain (6.26 gallons of water) will take up 7.85 gallons of space.
Great this was the exact thing I was looking for. All the other calculators were 404. So I would be pushing it. 6 gallons seems reasonable.

Another question? Is it best to sparge or top of a carboy to meet 5 gallons? Could someone explain how mash thickness is calculated?

 
Reply With Quote
Old 01-22-2013, 01:32 AM   #5
Yooper
Ale's What Cures You!
HBT_ADMIN.png
 
Yooper's Avatar
Recipes 
 
Jun 2006
UP of Michigan, Winter Texan
Posts: 69,045
Liked 7616 Times on 5360 Posts


Quote:
Originally Posted by Tipharet View Post
Great this was the exact thing I was looking for. All the other calculators were 404. So I would be pushing it. 6 gallons seems reasonable.

Another question? Is it best to sparge or top of a carboy to meet 5 gallons?
Sparging is the "best" way, because if you top off you'll dilute your wort. It's ok to do that if your OG is way high but otherwise, I'd sparge to my boil volume if it at all possible.
__________________
Broken Leg Brewery
Giving beer a leg to stand on since 2006

 
Reply With Quote
Old 01-22-2013, 02:01 AM   #6
christpuncher123
Recipes 
 
May 2009
Kingston, Ontario
Posts: 175
Liked 10 Times on 7 Posts


The best thing about cutting your water back and adding in the fermenter is you can nail your OG every time!



 
Reply With Quote
Reply
Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
BIAB Water Displacement by Grain cotillion All Grain & Partial Mash Brewing 20 08-03-2013 05:32 PM
Strike Water/Sparge Water Table for BIAB - Am I correct? scottvin Beginners Beer Brewing Forum 3 06-04-2012 08:50 PM
Sparge Water Displacement? glanville Beginners Beer Brewing Forum 5 03-11-2012 12:22 AM
displacement for second fermentation J_Thadeus_Toad Fermentation & Yeast 8 11-15-2011 04:46 PM
Displacement question? Jtd6628 Beginners Beer Brewing Forum 5 11-13-2011 02:19 AM


Forum Jump