Blow-Off Tube May 12 2015

Putting 5.5 gallons in a six gallon carboy? Planning to use a vigorous top-fermenting wheat yeast for your summer Hefeweizen? Adding blood oranges to your next batch of IPA? Then consider using a blow-off tube -- better that then coming home to a popped stopper or krausen gushing from your airlock.

Here's a few option for your blow-off setup, ***all of which have you placing ~1" of the tip of the tube into a bucket/pitcher of water or sanitizer:

  • Use Blow-off tubing, a 1" ID tube that fits neatly in the neck of a glass carboy.
  • Squeeze 1/2" ID over the middle part of a 3-piece airlock (see carboy on right in pic).
  • Jam 3/8" ID (or 5/16 ID) standard siphon tubing into a #6, 6.5, or 7 drilled rubber stopper (see carboy on left in pic). 
  • Fit 3/8" or 1/2" ID siphon tubing over one of the tips of a carboy cap.