Too Much Blow Off - Home Brew Forums
Register Now For Free!

Home Brew Forums > Home Brewing Beer > Fermentation & Yeast > Too Much Blow Off

Thread Tools
Old 01-25-2012, 07:30 PM   #1
Jan 2012
Staten Island, New York
Posts: 2

Hey guys,

I just brewed my second batch of beer, ever (partial mashes - IPA & Wit) and both times the kraeusen has knocked off a blowoff hose over the first night. The blow off hose is attached through a rubber stopper and the other end placed in a bucket with a small amount of water and SanStar. The first IPA was not contaminated, don't know about the Wit yet. The 5-gallon carboy is filled to just past the point where it STARTS to taper in.

How can I solve this problem? Less wort? Bigger blowoff hose?

Thanks for all the help.

Reply With Quote
Old 01-25-2012, 07:36 PM   #2
dstauth's Avatar
Mar 2011
Littleton, CO
Posts: 79
Liked 17 Times on 12 Posts

My suggestion would be to get a 6 gallon carboy or get a bigger blow-off tube like I use. It will fit into 3,5,6 gallon carboys. Then I just switch to my airlock after a couple days when most of the fermentation is over:
Click image for larger version

Name:	IMG_1644.JPG
Views:	772
Size:	42.3 KB
ID:	44965  

Reply With Quote
Old 01-25-2012, 07:36 PM   #3
Oct 2011
Denver, CO
Posts: 376
Liked 39 Times on 36 Posts

Less wort, a bigger carboy, or try Fermcap-s foam inhibitor drops.

Reply With Quote
Old 01-25-2012, 07:36 PM   #4
Jan 2011
Chicago, IL
Posts: 195
Liked 3 Times on 3 Posts

What size carboy are you using? I think you can get blowoff tubes that fit inside of the the entire mouth of the carboy. With your widened tubing, you'll get less back pressure. I use inch and half diameter tubing which fits inside the carboy. Haven't had any problems.


Reply With Quote
Old 01-25-2012, 07:40 PM   #5
Feb 2011
Milwaukee, WI
Posts: 204
Liked 31 Times on 21 Posts

You need a 6-gallon carboy or scaled down recipes. A good, active krausen is desirable but if it's hitting the hose with enough force to push it out of the carboy then there isn't enough room in there.

If you are using the hose/stopper combo I assume you are using a better bottle, which is what I use. I regularly have fermentations active enough to put an inch of yeast into the blowoff container but have never had the hose come close to being pushed out of the carboy.

Reply With Quote
Old 01-25-2012, 07:51 PM   #6
Nov 2009
Alternate Universe
Posts: 2,281
Liked 72 Times on 61 Posts

I'm about to go from 3.5 gallon stove top batches to 5.5 gallon batches. I ferment in a 5 gallon carboy for the 3.5 gallon batch and I've only had one slight blow off. It's convinced me to go with the large fermentation buckets when I switch over though for various reasons.

Reply With Quote
Thread Tools

Similar Threads
Thread Thread Starter Forum Replies Last Post
Do I need a blow off? Bill05 Fermentation & Yeast 12 06-12-2011 01:53 PM
Blow-off down-low. Schnitzengiggle Fermentation & Yeast 2 05-21-2011 07:49 PM
Blow off after on day 3 Rockweezy Fermentation & Yeast 7 02-27-2011 12:08 AM
A second blow-off? JMSetzler Fermentation & Yeast 1 02-04-2011 08:38 PM
Excess blow-off??? Now even the blow-off is fermenting... beowulf Fermentation & Yeast 3 07-13-2010 11:17 AM

Forum Jump