6 chamber plastic airlock for use with bored rubber bungs (part no. 35501).
These airlocks are compatible with the vast majority of fermentation vessels and demijohns. (But please do contact us if you're in any doubt and we will be happy to confirm whether they'll work with yours!)
An airlock is a vital component of any fermentation. Whether you're making wine, cider, beer or something else you need an airlock to allow CO2 to escape from your fermenter without allowing contamination in. Carbon Dioxide is a by product of any fermentation and must be allowed to escape without letting outside contaminants in to stop too much pressure from building up in the fermenter. An airlock allows this to happen.
To use these, simply fill halfway with water and add a bored bung, then seal your fermentation unit with it.
Airlock Plastic 6 Chamber - Works with All Fermenters