Air-lock with cap

Airlock with cap – classic S-shaped airlock

An S-shaped bubbler airlock for brewing beer, wine, cider and other fermentation. The airlock lets CO2 escape from the fermenter while keeping air out. The cap on top keeps dust and insects away from the opening.

How to use the airlock

1. Fill the airlock with water until both bends are about half full.
2. Fit the airlock into the hole or grommet in the fermenter lid.
3. Put the cap on.

Frequently asked questions about the airlock with cap

What should I fill the airlock with?

Clean water. The water in the bends lets gas out but keeps outside air from getting in.

Why is my airlock not bubbling?

It often takes half a day to a day before it starts to bubble. If it still does not bubble after that, the lid may be leaking so the gas escapes elsewhere. Fermentation is measured most reliably with a hydrometer.

Can I use the airlock for wine and cider?

Yes, the airlock works the same way for beer, wine, cider and other fermentation.

Related

• Fermentation equipment
• 33 L fermenting bucket with hole and lid
• 33 L fermenting bucket with tap and lid
• How to brew beer – a simple introduction (Norwegian)