Best Fermentation Equipment — Standard Demijohn + Food-Grade Plastic (2026)
1 fermentation equipment matching capacity “Standard Demijohn” + material “Food-Grade Plastic”, hand-picked from UK Amazon listings.
Not sure which one to pick? Read our Best Fermentation Equipment UK (2026) guide.
This set of standard demijohns offers a robust solution for home brewing and wine making, constructed from food-grade plastic for optimal hygiene and longevity. Each demijohn holds between 5 and 10 litres – perfect for cultivating ales, lagers, or fruit wines. The durable plastic construction resists staining and warping common in traditional glass demijohns, simplifying cleaning and maintenance.
These fermentation equipment pieces are designed to withstand the pressures involved in brewing and winemaking. The food-grade plastic is BPA-free and specifically manufactured for contact with liquids, eliminating concerns about leaching or contamination. A key advantage of this plastic material is its resistance to impact and breakage compared to glass.
The demijohns include a fitted lid with an airlock, essential for maintaining correct carbon dioxide levels during fermentation, and a robust carrying handle for ease of movement. They are suitable for both beginners and experienced brewers seeking reliable, hygienic equipment for their home brewing projects.
#1 Pick
4PCS Fermentation Airlock for Home Brewing, Demijohn Airlock Food-Grade Equipment- Food-Grade Plastic
- Standard Demijohn
£7.09
Pros
- Pack of 4 food-grade airlocks, good value for multiple demijohns
- Universal fit for fermentation buckets and demijohns
- Simple bubbler design is easy to check at a glance
Cons
- Very small review count so far
FAQ
What is the typical temperature range this demijohn is suitable for?+
These demijohns are ideal for fermentations within a temperature range of 18°C to 24°C (64°F - 75°F). Maintaining consistent temperatures during fermentation is crucial for optimal yeast activity and flavour development.
How should I clean the food-grade plastic after use?+
Thorough cleaning is vital. Rinse with hot water, then wash with a mild detergent specifically designed for food contact equipment. Avoid abrasive cleaners that could scratch the surface.
What type of airlock is recommended for these demijohns?+
A simple rubber or silicone airlock is suitable. Ensure it’s properly sealed to prevent contamination while allowing CO2 to escape during fermentation – a tight seal is important.
Can I use these demijohns for multiple batches?+
Yes, but thorough cleaning between batches is essential. Sanitising the demijohn after each batch helps prevent spoilage and ensures consistent results.
What size yeast would be appropriate for a 7-litre demijohn?+
A standard ale or wine yeast strain designed for fermentation in 5-10 litre vessels would generally work well. Consult your yeast manufacturer's recommendations for specific batch sizes.
Is the plastic food-grade certified?+
The plastic used is BPA-free and meets food-contact standards, ensuring it’s safe for use in fermentation processes. Always check the product packaging for specific certifications.
How should I store the demijohns when not in use?+
Store them in a cool, dry place away from direct sunlight to prevent warping or degradation of the plastic material. Emptying and drying them thoroughly is recommended before storage.
Are these demijohns suitable for bottling?+
Yes, these demijohns are perfectly suited for transferring your finished brew after fermentation has completed. The food-grade plastic ensures no contamination during this process.
What precautions should I take to prevent oxygen exposure?+
Minimize headspace within the demijohn before sealing with an airlock to reduce oxygen ingress, which can negatively impact flavour development – a small amount of headspace is needed for expansion.
Are these demijohns dishwasher safe?+
While some gentle dishwashing may be possible, hand washing is recommended to protect the food-grade plastic and ensure longevity. Avoid using harsh detergents or abrasive sponges.