How to Make Beer

Step 6Air Lock

Air Lock
This step can be done earlier but I chose to do it during the boil. In any case you'll want to keep one eye on the boil at all times. Did I warn you about boiling over?

I used a commercial air lock but you could fashion an air lock from a piece of clear vinyl tubing, one end fitted to the cap and the other end in a cup of water. The commercial air locks are only $1 or so and are included in the starter kits. I drilled a 3/8" hole in the water bottle cap. The air lock fits snugly in the hole. The idea is to let carbon dioxide produced during fermentation escape while keeping air outside from getting in.
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3 comments
Sep 1, 2009. 6:47 PMjada3282 says:
nm its easy to make
Aug 25, 2009. 6:39 PMjada3282 says:
where do i get one
May 17, 2006. 1:52 AMel kabong says:
You can also likely get a bung for $1.00 or less that will fit the water jug/fermenter. Online shops are great, but your Local Homebrew Supply Shop is probably even better. Check 'em out.

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Author:imarunner2
The picture is from the starting line at Grandma's Marathon in Duluth, MN. I'm in there somewhere near the middle of the pack.