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Old 02-13-2013, 08:01 AM   #1
Feb 2013
Davis Juction, Illinois
Posts: 20

I recently brewed a 13.5 gal batch of extract RIS (Home Brew Club Style for AHA). I think I may have pitched to much yeast. My air-lock blew off my fermenter. Luckily I saw the cap bulging and I a blow off tube sanitized and ready. My temp didn't get to high, I didn't smell any esters coming off the blow off tube. Will over-pitching effect my beer?

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Old 02-13-2013, 11:44 AM   #2
Nov 2010
Solway, MN
Posts: 10,243
Liked 1944 Times on 1542 Posts

I doubt that you pitched too much yeast for an RIS. That would require a very large starter done on a stir plate or several packs of dry yeast. Your RIS has a lot of fermentable sugars and the yeast just went nuts over it. Unless you had it in a fermentation chamber with temperature controller there is a good chance that the activity of the yeast raised the temperature of the beer by several degrees too which adds to the speed that the yeast consume the sugars.

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Old 02-13-2013, 06:12 PM   #3
Jun 2012
Salem, NH
Posts: 961
Liked 113 Times on 94 Posts

Don't worry about it. Just remember with big beers you need to set up a blow off tube for increased pressure and high krausen. I've never had high krausen blowing out my tube but many others have. Colder temps will help, my Imperial Stout I just made just before the new year was fermenting around 50 degrees in my apt, but the fermentation brought it up to 62-64 degrees I think. It heats up big time.
13+ gallons sounds like its going to be a great fall and winter! Thats a lot of RIS!

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