How to set up a 'blow off' hose to prevent an 'attack of the KRAUSEN!'

Monday, January 9, 2023

There's not much worse in terms of mess and clean up than going to check on your fermentation drum and discovering its contents have some how forced their way out the top of the airlock and all over the walls and even the ceiling. 

This can happen because you've managed to set conditions that the fermentation process was quite vigorous and the 'Krausen' was forced out the airlock (remember your drum lid is probably screwed on really tight so the airlock is the only place for it to go). 

A "blow off" hose is a simple but effective way to prevent an "attack of the Krausen" when brewing beer. 

To set up a blow off hose, you will need the following equipment:
  • A fermenter: The fermenter is where the beer is fermented and where the Krausen will form.
  • A blow off hose is basically tubing that is flexible and food-grade (source some from Amazon).
  • A bucket or container is used to catch the overflow of Krausen from the blow off hose.
set up blow off hose

To set up the blow off hose, follow these steps:
  1. Attach the blow off hose to the fermenter: Insert the end of the blow off hose into the fermenter, making sure that it is securely attached.
  2. Place the other end of the hose in a bucket or container: Place the other end of the hose in a bucket or container, making sure that the container is large enough to catch any overflow.
  3. Fill the bucket or container with a sanitizing solution, such as Star San or chlorine, to prevent contamination.
  4. Start fermentation: Once the blow off hose is set up, start the fermentation process as usual. The Krausen will form on top of the beer, and any overflow will be diverted into the bucket or container through the blow off hose.
how to stop a krausen explosion

Once the Krausen even is over, you can swap the blow off house for a bubble airlock if you wish.


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