Water Cans are a good substitute for carboy fermenter. These Plastic Demijohns are easily available, inexpensive and light weight. Unlike glass carboy, plastic water cans don’t break when handled roughly.
Today, we will talk about how to convert your water carboy into a low-cost fermenter. How to attach a DIY airlock to it. Crafting your own setup and equipment only increases the joy of a hobby. Last week we had talked about DIY sanitizer. A blowoff tube can be attached to commonly available airtight containers especially the water cans, milk cans (which have large enough mouth for easy cleaning), or pickle jars with airtight lids. Do read our article on the equipment checklist to understand the Dos and Don’t of making equipment at home.
Plastic Carboy Fermenter
- drilling setup
- 1 piece surgical gloves
- 1 piece baloon
- 1 piece RO tube or pipe
- 2-3 drops quickfix or adhesive
- 1 piece plastic bottle or container
- 500 ml sanitized water
- First step is to clean the fermenter
- Add your wort (beer), grape juice (wine) or ganne ka juice (toddy)
- Add some brewer's yeast of appropriate strain (0.5-1gm/liter) to kickstart fermentation
- Now comes the most important step: To prevent oxidation of the fermentation over the next 2-3 days when the sugar is getting converted to ethanol. For this most recipe books will recommend a airlock. If you are unable to procure one use the following options
- Alternative 1: surgical glove. Cover the mouth of the fermenter (bisleri water can) with the glove. Gloves will inflate as it gathers CO2. Once it is inflated, you can release some CO2 (about 2 times a day should be sufficient). Alternatively, you can prick a minute hole in the glove so that the accumulated CO2 gets released on its own. Instead of a glove, you can use a baloon as well.
- Alternative 2: Blow off tube: Rather than using the standard S type airlock, for vigrous fermentation it is recommended to use a blow off tube. Essentially you make something like a hookah. Allow the CO2 made from fermenting ethanol/alcohol/beer/wine through a water filter. Water will allow the CO2 to pass through but not allow the Oxygen to enter back. Just remember to have sufficient quantity of sanitized water in the collection container.
- Alternative 3: If you are making a small batch of ginger ale or toddy, then you can make it in a 2.5 Liters pepsi or cold drink bottle as well. PET plastic is ideally suited to withstand pressure and as long as you are able to vent out the build up pressure 2-4 times a day, it should be safe. Keeping the bottles in a cool place (desert air cooler tank, air conditioned room or refrigrator) would slow up fermentation and slow down chances of too much CO2 build up.
- Alternative 4: To use a proper airlock.