Home Brew Forums > Home Brewing Beer > Beginners Beer Brewing Forum > Pre-boil gravity question
Reply
 
Thread Tools
Old 01-31-2013, 12:00 AM   #1
Sea_of_Shells
Feedback Score: 0 reviews
Recipes 
 
Join Date: Aug 2012
Location: Simi Valley, CA
Posts: 79
Liked 3 Times on 2 Posts
Likes Given: 2

Default Pre-boil gravity question

Greetings.

Partial mash home brewer here. Since I'm not doing a full boil (only about 4 gallons), is there even a point in taking a pre-boil gravity if I'm going to end up adding top off water post boil? I'd like to be able to calculate my efficiency. Will the top off water (and lack of extract) make it pointless? I know the top off water is added after the boil, but I'm just making sure.


Sea_of_Shells is offline
 
Reply With Quote
Old 01-31-2013, 12:01 AM   #2
duboman
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jul 2011
Location: Glenview, IL
Posts: 6,365
Liked 506 Times on 468 Posts
Likes Given: 226

Default

Quote:
Originally Posted by Sea_of_Shells
Greetings.

Partial mash home brewer here. Since I'm not doing a full boil (only about 4 gallons), is there even a point in taking a pre-boil gravity if I'm going to end up adding top off water post boil? I'd like to be able to calculate my efficiency. Will the top off water (and lack of extract) make it pointless? I know the top off water is added after the boil, but I'm just making sure.
Pre boil gravity will tell you what your mash/lauter efficiency is in how well you extracted sugars.


__________________
Nothing Left to do but smile and drink beer.....

The Commune Brewing Company-Perfecting the "art" of beer since 2010
duboman is online now
 
Reply With Quote
Old 01-31-2013, 12:04 AM   #3
peter78
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jun 2011
Location: Washington, DC
Posts: 152
Liked 2 Times on 2 Posts

Default

You can calculate it here. Depending where you get your grains and who mills them you will get different efficiencies which will change your OG. You can fix it with some extra DME

http://www.brewersfriend.com/stats/
peter78 is offline
 
Reply With Quote
Old 01-31-2013, 12:14 AM   #4
Sea_of_Shells
Feedback Score: 0 reviews
Recipes 
 
Join Date: Aug 2012
Location: Simi Valley, CA
Posts: 79
Liked 3 Times on 2 Posts
Likes Given: 2

Default

Thanks, boys.
Sea_of_Shells is offline
 
Reply With Quote
Reply


Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
pre/post boil gravity question kpot2004 All Grain & Partial Mash Brewing 5 12-07-2012 08:59 PM
1st running gravity vs pre boil gravity vs post boil gravity TTB All Grain & Partial Mash Brewing 3 12-07-2012 07:55 AM
Hitting Pre-boil gravity, missing Post-boil gravity jbags5 Beginners Beer Brewing Forum 20 09-29-2012 01:41 PM
Boil off gravity question lunchbox General Beer Discussion 3 02-02-2010 09:11 PM
how can I determine post-boil gravity from a pre-boil gravity reading? snailsongs General Techniques 5 03-05-2009 04:42 PM


Forum Jump

Newest Threads

LATEST SPONSOR DEALS