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Old 01-30-2013, 11:00 PM   #1
Sea_of_Shells
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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.

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Old 01-30-2013, 11:01 PM   #2
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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.
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Old 01-30-2013, 11:04 PM   #3
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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/

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Old 01-30-2013, 11:14 PM   #4
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Thanks, boys.

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