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Old 03-22-2009, 08:51 AM   #1
Mar 2009
Posts: 46
Liked 3 Times on 1 Posts

My next batch is going to be an amber ale(extract with grains). I will be using a starter and expect some pretty vigorous fermentation at first. I am planning on using a blow off tube. Do I keep the blow off tube on for the whole fermentation (approx 10-14 days) or do I replace it with an airlock once fermentation has slowed?

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Old 03-22-2009, 09:36 AM   #2
ifishsum's Avatar
Aug 2008
Portland OR
Posts: 1,447
Liked 9 Times on 8 Posts

I replace it with an airlock once it's clear that fermentation is slowing down, usually after 3-4 days.
"If you're gonna be an ape, be a hairy one" - Spyder

Primary 2: Edwort's Robust Porter
Secondary 1: LW Pale Ale
Secondary 1: Blackened Soul RIS
Kegged: Dead Guy Ale
Kegged: Rye Pale Ale
Kegged: Haus Pale Ale
Kegged: Nut Brown Ale
Kegged: Afrikan Amber
Kegged: Jock Scott Ale
Kegged: Afrikan Amber

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Old 03-22-2009, 12:52 PM   #3
Oct 2008
West Michigan
Posts: 503
Liked 10 Times on 9 Posts

Originally Posted by ifishsum View Post
I replace it with an airlock once it's clear that fermentation is slowing down, usually after 3-4 days.
Same here...

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Old 03-22-2009, 12:57 PM   #4
Jan 2009
Indianapolis, Indiana
Posts: 937
Liked 45 Times on 34 Posts

yep, couple of days
Burning Fence Brewery

"blessing of your heart, you brew a good ale"

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Old 07-16-2009, 04:45 PM   #5
Jan 2009
Chicago, IL
Posts: 19

If I'm lazy and don't feel like sanitizing the bung and airlock, does it really make a difference for a 7-10 day fermentation if you leave the blow-off tube the whole time?

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Old 07-16-2009, 04:50 PM   #6
Wild Duk
Mar 2008
Posts: 317

you can leave it on as long as you want......It does the same thing as a 3 piece airlock

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Old 07-16-2009, 05:21 PM   #7
Apr 2009
Longview, TX
Posts: 529
Liked 4 Times on 4 Posts

I leave mine in the whole time due to clearance issues in my chamber.
Primary:A simple Bock, Vienna

Bottled: Centennial Blonde, Mostly Dead Guy Ale, Pale Rye Ale

On Deck: waiting...

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Old 07-23-2009, 05:10 PM   #8
Jul 2009
Southern Indiana
Posts: 12

I leave mine on for the entire first week, until the Kraussen falls. Right, wrong, or indifferent, I always use secondary fermenters, and use a 3 piece air lock on it. It might be in my head, but I like to think it is clearing up, and I am able to filter anything out of the secondary.

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Old 07-24-2009, 05:42 PM   #9
Jul 2007
Drexel Hill, PA
Posts: 27

I've never used one... Is that weird? I've brewed some pretty big batches without a problem.

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