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Old 11-11-2012, 10:34 PM   #1
rboz
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Default Original Gravity problems

I understand that it is the general consensus to measure OG before pitching your yeast, but does that also mean measuring it before you add your excess water? I had 3 and a half gallons of wort that measured 1.100 OG, I measured this before I pitched my yeast and added it to 2 gal of water. Obviously the water would dilute it, but by how much? Should I use that number for my OG?


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Old 11-11-2012, 10:40 PM   #2
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You should definately add the water to the wort before pitching the yeast. Pitching should be the final step.

Two gallons of water will change the OG considerably, and the OG of the wort itself doesn't matter if you are adding water. (It doesn't not matter, but...well I don't know how to use it).

I use the OG of the beer after adding water to the wort before pitching yeast. Adding water before pitching helps cool the wort, also.

Cheers.


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Old 11-11-2012, 10:42 PM   #3
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Depends on your recipe. Some recipes, like those in Palmer's "How to Brew", give 2 OGs: one for 3 gallons of wort, and one for 5 gallons of wort.

Why not just take 2 measurements?
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Old 11-11-2012, 10:45 PM   #4
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Ok good to know, is there any way I can estimate the OG (post water addition)?
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Old 11-11-2012, 10:47 PM   #5
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3.5(100)=5.5(X)
Solve for X. New gravity after adding 2 gallons of water should be 1.063


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