This simple CO2 regulator is used to slowly release CO2 gases from the fermentation process of wine or beer using water and a few parts that can be found quite easily. It works by allowing CO2 to get out of the fermenter without permitting oxygen to enter. If oxygen was to get into the fermenter, it would stop the yeast from making ethanol alcohol.
Step 1: Gather the parts.
Parts that you will need:
-3 inches of 3/8 inch hose
-Hot glue or other sealant
-A water bottle
-Clear film canister (usually available at any place that develops photos, ask for one)
Tools that will come in handy:
-Drill with 3/8 inch and 1/2 inch drill bits
-Belt sander/metal file/sandpaper
Step 2: Drilling and fitting
First drill the 1/2 inch hole in the exact center of the bottom of the film canister. It should have a little dimple where the tip of your drill bit will sit nicely. Next, drill a 3/8 inch hole through the clamp. A bench vice helps. Once the holes are drilled, fit your tubing through the hole in the cork. You will need to calibrate and trim the tube, but we will get to that later. Next force the cork into the 1/2 inch hole in the bottom of the film canister a bit more than 1/4 an inch. After you these parts put together, you will need to seal the cork into the canister. I used hot glue but other sealants should work.