Happy HolidaySs Giveaway - Winners Re-Re-Re-Re-Re-Drawn - 24 hours to Claim!

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


Home Brew Forums > Home Brewing Beer > Beginners Beer Brewing Forum > BIAB -- Calculating total water needed
Reply
 
LinkBack Thread Tools
Old 12-04-2011, 02:41 AM   #1
BarberSurgeon
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jun 2011
Location: Morgantown, WV
Posts: 74
Default BIAB -- Calculating total water needed

I'll be brewing up my first AG BIAB tomorrow. I'm making a two-gallon batch with 4.2 pounds of grain. Beer Smith suggests I use 6.56 qts of water for the mash then sparge with 1.37 qts (I may not sparge). I understand that boil-off will vary with temperature, climate, and altitude, but how much can I expect the grains to absorb? There seem to be so many factors to consider just to get down to 2 gallons. Please help!

__________________
Hylopathic Productions (WARNING: METAL!!!)
BarberSurgeon is offline
 
Reply With Quote Quick reply to this message
Old 12-04-2011, 02:47 AM   #2
helibrewer
HBT_SUPPORTER.png
Feedback Score: 1 reviews
 
helibrewer's Avatar
Recipes 
 
Join Date: Nov 2011
Location: Santa Rosa, CA
Posts: 3,570
Liked 260 Times on 226 Posts
Likes Given: 70

Default

I believe .13 gallons per pound of grain is a reasonable estimate until you take actual readings from your rig. That would be about .5 gallons for your recipe.

__________________
Something is always fermenting....
"It's Bahl Hornin'"

Primary:
Brite Tank/Lagering:
Kegged: Sour Saison, Pale Ale, Aggie Ale
Bottled: Belgian Quad (Grand Reserve), Derangement (Belgian Dark Strong)
On Deck: Firestone DBA, De Koninck Blonde
My Site: www.restlesscellars.com
helibrewer is offline
 
Reply With Quote Quick reply to this message
Old 12-04-2011, 02:48 AM   #3
OldWorld
Feedback Score: 0 reviews
Recipes 
 
Join Date: Dec 2008
Posts: 377
Liked 13 Times on 10 Posts

Default

I don't want to discourage you but 2 gallons is hardly worth the effort. Can't you do more? Surely you can find some food grade plastic buckets for free or cheap. There has to be a commercial bakery that buys molasses or corn syrup in buckets in your area. It's food grade and often thrown away.

I would not invest anytime in making less than 4.5 gallons... a 5 gallon batch will yield 4.5 gallons or a slightly more...depending on carboy space etc...


Here is a basic article on the process...Have fun.

Stovetop All Grain Small Batch Brewing - Lustreking Brewing

__________________
OldWorld is offline
 
Reply With Quote Quick reply to this message
Old 12-04-2011, 03:06 AM   #4
BarberSurgeon
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jun 2011
Location: Morgantown, WV
Posts: 74
Default

Quote:
Originally Posted by OldWorld View Post
I don't want to discourage you but 2 gallons is hardly worth the effort. Can't you do more? Surely you can find some food grade plastic buckets for free or cheap. There has to be a commercial bakery that buys molasses or corn syrup in buckets in your area. It's food grade and often thrown away.

I would not invest anytime in making less than 4.5 gallons... a 5 gallon batch will yield 4.5 gallons or a slightly more...depending on carboy space etc...


Here is a basic article on the process...Have fun.

Stovetop All Grain Small Batch Brewing - Lustreking Brewing
I'm sure your advice is sound and great coming from your situation, but I've been making 2 gallon batches of extract for months and love it. It's practical, fast, and I get to try a lot of different recipes in quick succession. I started on 5 gallons and just hate the maintenance, cleanup and having to drink that much of the same beer.
__________________
Hylopathic Productions (WARNING: METAL!!!)
BarberSurgeon is offline
 
Reply With Quote Quick reply to this message
Old 12-04-2011, 03:06 AM   #5
Ramitt
HBT_SUPPORTER.png
Feedback Score: 0 reviews
 
Ramitt's Avatar
Recipes 
 
Join Date: Sep 2011
Location: Bloomington, Indiana
Posts: 1,090
Liked 61 Times on 58 Posts
Likes Given: 158

Default

Quote:
Originally Posted by OldWorld View Post
I don't want to discourage you but 2 gallons is hardly worth the effort
I don't think that is true at all. A samll batch can be much quicker and cheaper and great for experimenting.
__________________
Ramitt is offline
 
Reply With Quote Quick reply to this message
Old 12-04-2011, 03:11 AM   #6
bomberman
Feedback Score: 0 reviews
Recipes 
 
Join Date: Oct 2011
Location: Middlebury, VT
Posts: 91
Liked 1 Times on 1 Posts
Likes Given: 9

Default

I'd disagree that a small batch isn't worth making. Less product for the same amount of time/effort, fine, but I see a lot of advantages to a smaller batch size.

My first BIAB I was almost a gallon short post boil because I underestimated how much water the grain would absorb. With the smaller batches the absorption factor will make a bit difference in final volume, so I'd personally be paying attention to those numbers. Other than that I'm still working out the kinks in the process myself.

__________________
bomberman is offline
 
Reply With Quote Quick reply to this message
Old 12-04-2011, 03:15 AM   #7
Seven
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jan 2011
Location: Pittsburgh, PA
Posts: 1,531
Liked 141 Times on 75 Posts
Likes Given: 107

Default

This may help you: BIAB Water Volume Calculator

__________________
Seven is offline
 
Reply With Quote Quick reply to this message
Old 12-04-2011, 03:25 AM   #8
Buna_Bere
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jan 2009
Location: Boston, MA
Posts: 258
Liked 21 Times on 19 Posts
Likes Given: 3

Default

I use 0.09 gallons per pound of grain for absorbtion. I don't squeeze the bag, I put it in a strainer over the boil kettle and let it drip for 10 minutes. I measured the absorbtion for the first few batches so I'd have a good number for my system. I don't sparge and get a pretty consistent 65% efficiency into the boiler. As far as boil off, 1.25 gallons an hour would be a good guess until you can measure it. Enjoy your brew day.

__________________
Buna_Bere is offline
 
Reply With Quote Quick reply to this message
Old 12-04-2011, 03:44 AM   #9
BarberSurgeon
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jun 2011
Location: Morgantown, WV
Posts: 74
Default

Quote:
Originally Posted by Seven View Post
This may help you: BIAB Water Volume Calculator
Definitely looks like a good start. This calculator suggested I strike with 3.53 gallons (assuming no sparge), with .53 going to the grains and 1 gallon to boil-off.

I'm boiling up a gallon in my kettle now to see how much I lose in a half hour. The first link claims that if I multiply the loss by two, I should get an approximate boil-off rate.
__________________
Hylopathic Productions (WARNING: METAL!!!)
BarberSurgeon is offline
 
Reply With Quote Quick reply to this message
Old 12-04-2011, 04:36 AM   #10
BarberSurgeon
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jun 2011
Location: Morgantown, WV
Posts: 74
Default

Okay, is this even possible? I just measured a 33% (1/3) boil-off in 30 minutes in my one-gallon system test. I am no expert on the physics behind this stuff, but does that mean I'll lose 2/3 of my starting volume over an hour? That seems crazy. This is by no means my first boil, and I've never lost that much before. I'm guessing there are other factors such as head space and kettle-volume to water-volume ratio that affected this measurement...

__________________
Hylopathic Productions (WARNING: METAL!!!)
BarberSurgeon 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
First AG BIAB. Pretty sure I made water. puter Beginners Beer Brewing Forum 25 08-22-2011 11:26 PM
Water Volume - BIAB skelrad Beginners Beer Brewing Forum 3 01-16-2011 01:36 PM
Total noob error. Major air lock water disaster question HollywoodMX Beginners Beer Brewing Forum 19 11-23-2010 05:12 PM
Assistance calculating mash and sparge water volumes Hopheader Beginners Beer Brewing Forum 7 11-29-2009 05:59 AM
How much water is needed for boil? Rubberband Beginners Beer Brewing Forum 2 01-10-2009 04:54 AM



Newest Threads

LATEST SPONSOR DEALS