Origin: Enolandia – Italia
The most popular airlock. Protects against flies, oxidation and contamination. Suitable for containers in the range of 1-50 l. Fits a 9 mm hole.
What does an airlock do?
Filling the airlock with a little water makes it act as a siphon; the water closes the beer or wine off from the outside air; hence preventing outside bacteria from entering. However, it allows the carbon dioxide formed during fermentation to escape through the airlock because of the excess pressure.