Demijohn Handy Airlock (Small)

The small handy Demijohn Airlock, ideal for limited space, releases the fermentation gas and stops air from returning to the fermenter.

This chamber-style airlock fits our bored and rubber or cork bungs and grommets. 

To use this airlock, half-fill the bottom chamber with water, then replace the lid. 

Using a demijohn airlock protects the "wort" or "must" by allowing any carbon dioxide produced during fermentation to escape whilst preventing air admittance.  

Our wine or beer airlocks are also designed to be visual aid.  

The clear plastic means you can see how fast the CO2 is being created and assess how the fermentation is progressing.

The wine airlock ensures a contamination-free environment for brewing vessels. 

Homebrewers and UK product designers have developed this essential equipment to be as effective and easily used as possible.

Easy to use: Part fill with water and replace the lid into position. 

All you have to do then is check that water is in the airlock occasionally.

The demijohn airlock can also cope with more vigorous fermentations.

Sleek, easy-clean design

Minimises evaporation

What Is a beer or wine airlock?

An airlock has many names, often called a fermentation lock, bubbler, trap or lock, although the proper term is an airlock. 

It is used during fermentation to stop air from entering the fermenter while allowing the carbon dioxide gas produced to escape when making your beer or wine. 

This wine or beer airlock (handy airlock) has a two-piece design, the main chamber and a top part.

Why Do You Need It?

An airlock is a vital piece of equipment in the brewing process. The airlock will stop any oxygen from getting inside the fermenter, allowing any gas made during fermentation to escape. 

The air surrounding us has microscopic bacteria that we are immune to, but the fermenting liquid may not. 

The bacteria will then attack the fermenting beer, wine or cider and turn it into vinegar - not very pleasant. 

The airlock is a barrier between the air and the fermenting liquid. 

Without an airlock, the risk of bacteria getting into the brew would increase significantly.

How Do You Use It?

The small airlock is simple to fill with water. Just remove the top part and pour water into the outer chamber to about halfway, then replace the top. 

The airlock can then be inserted into the grommet on your fermenter lid or pushed in a bung if the opening is wide. 

This type of airlock is smaller than others - ideal for those with limited headspace.