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Old 06-06-2008, 05:50 PM   #1
anth
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Default Missed final volume - reboil after fermentation?

Okay... first of all I know it's all my fault for rushing my brew day to have dinner with SWMBO.

So I accidentally added a "little" extra water to the mash. I drained it all to the kettle and began my boil. I just bought a new 60qt pot and haven't marked off the volumes on my spoon, so 2 hours into the boil I think I'm around 5.5 gallons. I chill the wort, toss it in the primary and pitch the yeast...and happen to notice that I'm at the 7 gallon marker on my 7.5 gallon conical. SWEEEEET.

After fermenting for ~5 days, it tastes...very very weak.

My question to you: Should I rack off the yeast and boil down to 5.5g?

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Old 06-06-2008, 05:54 PM   #2
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Young, or "green" beer is what you have right now, since it hasn't had time to condition. All beers taste like this until they have had a chance to age...typically one month from pitching the yeast, but up to several months for bigger beers. Don't boil your beer after fermentation has happened, just give it at least 2 weeks in the fermenter. At 5 days, it may not even be done fermenting yet, which may also account for the thin taste.

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Old 06-06-2008, 05:56 PM   #3
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Correct me if I am wrong, but if you boil it after fermenting all you will do is drive off the alcohol and get a non-alcoholic beer....

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Old 06-06-2008, 05:59 PM   #4
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Quote:
Correct me if I am wrong, but if you boil it after fermenting all you will do is drive off the alcohol and get a non-alcoholic beer....
Sorry, I should have clarified. After reboiling, I would either toss it back onto the yeast cake (I'll keep it sanitary, don't worry) or pitch new yeast.


And thanks for the quick replies!
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Old 06-06-2008, 06:09 PM   #5
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Quote:
Originally Posted by ledonne View Post
Sorry, I should have clarified. After reboiling, I would either toss it back onto the yeast cake (I'll keep it sanitary, don't worry) or pitch new yeast.


And thanks for the quick replies!
Most of the alcohol that will be in the beer has already been produced at five days. There won't be enough sugar in solution to turn it into beer again if you pitch more yeast.

More than driving off any alcohol, you'll also volatilize many flavor components of your beer -- most importantly any aroma/flavor hops.

Instead of boiling, I'd suggest brewing a higher gravity beer next and then blending them.
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Old 06-06-2008, 06:15 PM   #6
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I think if you do re-boil you will lose whatever alcohol content you have , like Cakehole mentioned, therefore you will need to adjust your OG (maybe add cornsugar). Personally , I would leave it , and if you don't like it, keep it for when the inlaws visit.

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Old 06-06-2008, 06:21 PM   #7
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Quote:
Originally Posted by Jack View Post
Most of the alcohol that will be in the beer has already been produced at five days. There won't be enough sugar in solution to turn it into beer again if you pitch more yeast.

More than driving off any alcohol, you'll also volatilize many flavor components of your beer -- most importantly any aroma/flavor hops.

Instead of boiling, I'd suggest brewing a higher gravity beer next and then blending them.
Thanks for the suggesion. That's a good idea. I forgot that just boiling it down wouldn't add more fermentables...
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Old 06-06-2008, 06:27 PM   #8
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Yeah, I'd say this is a case of RDWHABH.....just let it ride man

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Old 06-06-2008, 06:33 PM   #9
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Do not re-boil the beer after fermentation. Alcohol boils at a much lower temperature (in the 170F's I believe) so you will end up with an even worse flavour than you have now. Pitching new yeast at that point would also be a waste. Any fermentables would already have been consumed and the yeast would just settle out. There is also the driving off of the volatiles as Jack mentioned.

What was your actual OG? If it's still decent just enjoy the session beer for what it is. Your only other option is blending with another beer as Jack also mentioned. I would definitely not add dextrose (corn sugar) as that will simply thin the beer even more.

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Old 06-06-2008, 07:30 PM   #10
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What was your OG before pitching?

Why did you collect so much preboil wort anyway? 2 hours of boildown resulting in 7 gallons? Woah.

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