Cap'n Jewbeard said:Conversely, no.
Fermenting 5-gal batches in 6-gal carboys, I've only ever needed a blowoff once, for a hefeweizen some years ago. I wound up using the blowoff for the next few batches, but mostly just because I liked it, not so much because it was needed.
norsk said:I only use a blow off for my bigger beers...and then it's only a hose connected to the tube on the airlock. I use 7 gal buckets for 6 gal brews and on some of the big beers there is a lot of activity going on.
hitransplant said:you probably don't need one, until you do...
then you'll have a mess.
Cheap, easy, why not?
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