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Old 02-08-2007, 11:13 AM   #1
neil
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Default blow-off tube problem

Hey fella's
I've never had this happen before. I brewed a stout last Saturday. Had the blow off tube in place with about 4" of water in a qt jar. The car boy is in view all the time. This morning I noticed the water was gone from the jar! I don't think it evaporated that fast cuz I looked at it yesterday when I got home from work. Do you think it got sucked back into the carboy? The blowoff tube is about 16". I normally only keep the b/o tube on for a few days that put a regular airlock on it....hope the beer is ok...
neil

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Old 02-08-2007, 11:20 AM   #2
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Do you have a cat or dog? I can't think of a reason fermenting beer would "pull" water back that far... or that completely... beer should be ok, the co2 is going out, not in.

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Old 02-08-2007, 11:25 AM   #3
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Hi... I should have mentioned there were no pets in the house....it may have evaporated and I just didn't pay that much attention to the level of the water when I checked it yesterday....we have the heat on most of the day and off during the night....
I guess the only thing to do is bottle it and hope for the best...
tnx for the reply...
neil

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Old 02-08-2007, 11:25 AM   #4
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I brewed a stout the other day and placed it on a yeast cake from a brown. The fermentation was violent. After the first day the airlock was dry. I guessed it was from the amount of bubbles coming out. I just added some water and it ended up fine.

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Old 02-08-2007, 12:51 PM   #5
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it could have evaporated. i have a ten gallon fish tank on the bar, and i'm topping it off with about three gallons every two or three days. it's dry dry dry now that the ground finally froze.

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Old 02-08-2007, 12:54 PM   #6
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I think it may have sucked it into the carboy. I use a 36" long blow off tube so 16" seems real short

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Old 02-08-2007, 02:31 PM   #7
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I agree with the sucking back in theory... What was the temp of the wort in the carboy? How much did it cool? In the end, you may just end up with a bit more beer!


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Old 02-08-2007, 05:35 PM   #8
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hi, how much headspace do you have in your fermerntor. You indicate that you turn off heat over night. The temp fluctuation would have a negligable effect on the volume of the wort. The head space above the wort however, would change in volume considerably with temperature change. so if the fermentation was rapid (not releasing much CO2 now) then as the headspace cooled it could have created a vacuum and thus sucked in the fluid in your blow off container. Of course evaporation will be responsible for at least some of the water loss. especially in the dry winter monthes. If it was plain water then, I'd bottle and hope for the best.
right on
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Old 02-08-2007, 09:18 PM   #9
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tnx for all the replies and thoughts....I was kinda leaning towards the idea that it was sucked back in as well. I think I may have just confirmed that too. I just checked the level in the carboy and it is higher then when I pitched the yeast! I was only water, but pretty skanky looking water. I wonder if there was enough alcohol to combat all the skankyness? moral of the story....remove blow-off tube after the vigorous fermention stops...
you guys have a good one...
neil

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Old 02-08-2007, 11:54 PM   #10
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Yah, the headspace heating and cooling will definately mess with a blow off. By the way, why was your blow off tube submerged in skanky water? Wouldnt you want this to be pretty clean, regardless of the suckback?

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