Rubber bung for carboy PET 12/23 litre with 9mm hole

The rubber stopper is specifically designed for PET fermentation bottles with a volume of 12 or 23 liters and fits perfectly on these. No precise fit is guaranteed for 25 liter bottles.

The plug is easy to clean and reusable. For optimal longevity, we recommend hand washing after each use.

Yes, with prolonged contact with color-intensive liquids like red wine, the light rubber may develop slight discoloration. This does not, however, affect the function or food safety of the stopper.

The hole in the stopper is exactly 9 mm. Using a wider fermentation bung may cause material stress or damage, which could affect the seal.

The stopper is made of high-quality rubber and is designed for reliable function at standard fermentation temperatures. It retains its properties to ensure a tight seal.

Yes, the rubber stopper is made of food-safe rubber. It ensures safe use in wine, beer, and other fermentation processes.

Yes, the stopper is made of food-grade rubber that does not release harmful substances. It is therefore safe to use for the production of organic wines and other organic beverages.

The stopper has a central hole of 9 mm diameter. Any fermentation bung with a matching diameter of 9 mm can be used.

The rubber stopper is robust and designed for long-lasting fermentation processes. It provides a durable, tight seal and is more long-lasting than conventional rubber caps.

The hole in the stopper is exactly 9 mm. A fermentation lock with an 8mm diameter should fit without any issues and can be used with the stopper.

Yes, the stopper provides a tight seal that reliably prevents the ingress of air and contaminants. This ensures optimal fermentation conditions, even over extended periods.

Before first use and after each fermentation, the stopper should be thoroughly cleaned. Boiling is not mandatory; a hygienic cleaning is sufficient for food-grade rubber.

Yes, the rubber stopper is lightweight (0.10 kg) and user-friendly. It can be easily inserted and removed thanks to its conical shape and smooth surface.

The stopper is made of durable rubber and withstands cool temperatures well. It retains its seal even during prolonged storage in the refrigerator.

The rubber stopper is precisely designed for PET bottles with a volume of 12/23L. It can also be used for other containers if the neck opening exactly matches the dimensions of 52/43 mm (top/bottom).

Place the stopper on the cleaned fermentation bottle. Then insert the fermentation bung into the 9 mm hole and fill it with water to ensure optimal protection.

Yes, the stopper is versatile and can be used for wine, beer, and other fermented beverages, including vinegar production. It ensures a tight seal for optimal processes.

The rubber stopper is specifically designed for fermentation processes where pressure builds up. When correctly installed and with a suitable fermentation lock, it securely holds the pressure in PET bottles.

The stopper is precisely designed for fermentation bottles made of PET with a volume of 12 or 23 liters. It is not explicitly intended for other materials or sizes.

This conical rubber stopper wears out more slowly than rubber caps and provides a more durable and precise seal. This ensures more reliable and long-lasting use.