Fermentation bung DUPLEX 1A, for barrels 200 - 500 l

Cylindrical model of excellent quality. Easy to clean. Recommended for larger drums.

• For 200-500 l drums
• Dimensions (Ø x H): 8 cm x 20.5 cm
• Suitable for an opening of 17 mm

How does a fermentation bung work?
Because the fermentation bung is half-filled with water, it acts like a kind of siphon, closing off the wine or beer in the fermentation barrel from the outside air. This prevents bacteria from entering from the outside; the carbonic acid produced during fermentation, on the other hand, can escape as a result of the excess pressure.

Tubular models are the cheapest, but are more difficult to clean than cylindrical models. When the fermentation tank capacity exceeds 50 liters, the use of cylindrical models is necessary because of the increased carbon dioxide emission.

The water in the fermentation bung evaporates: regular control of the water level and possible refilling is necessary. The fermentation bung can also be filled with a disinfecting solution instead of ordinary water.