Instructables

How to Make Beer

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Step 6: 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.
jada32825 years ago
nm its easy to make
jada32825 years ago
where do i get one
el kabong8 years ago
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.