Best Fermentation Equipment — Standard Demijohn (2026)
8 fermentation equipment matching capacity “Standard Demijohn”, hand-picked from UK Amazon listings.
Not sure which one to pick? Read our Best Fermentation Equipment UK (2026) guide.
This Standard Demijohn Fermentation Equipment kit provides everything you need to reliably brew your own wine or cider using the traditional method. It’s designed around a standard 5-gallon (20 litre) demijohn, offering ample space for fermentation and maturation. The kit includes a robust, food-grade plastic demijohn itself, alongside a collection of essential tools – including a stainless steel paddle for agitation, an airlock system to maintain carbon dioxide levels during fermentation, and a thermometer for monitoring temperature. This equipment is ideal for those aiming for a classic, unpressured winemaking experience.
The kit focuses on providing the foundational elements for successful fermentation. The demijohn’s construction ensures durability and sanitation, crucial in preventing unwanted microbial growth. The paddle facilitates consistent mixing, vital for distributing nutrients and oxygen within the liquid – a key factor in healthy yeast activity. The airlock allows carbon dioxide to escape while preventing outside contaminants from entering, maintaining an anaerobic environment ideal for fermentation.
This equipment offers a solid starting point for home winemakers wanting to experiment with fruit wines or cider without the complexity of pressing grapes. While advanced techniques require additional investment, this kit provides the core tools needed to produce enjoyable beverages. Remember that proper sanitation and careful monitoring are critical throughout the entire process to ensure a high-quality final product.
#1 Pick
Fermentation Bubbler Airlock & Bored Cork Bung for Demijohn- Plastic & Cork
- Standard Demijohn
£6.99
Pros
- Lets CO2 escape while keeping contamination out
- Bored cork bung fits standard glass demijohns
- Cheap essential accessory for any fermentation set-up
Cons
- Cork bung can dry out over time and need replacing
#2 Pick
DIAH DO IT AT HOME Fermentation Airlock and Bored Bung Cork Stopper for Glass Demijohn (6 x Airlocks + Bungs)- Rubber & Plastic
- Standard Demijohn
£11.95
Pros
- Pack of 6 airlocks and bungs, good value for multiple demijohns
- 6-bubble chamber design makes fermentation easy to monitor
- Works across beer, wine, cider and kombucha brewing
Cons
- Rubber bungs vary slightly in fit between demijohn necks
#3 Pick
4 Pcs Fermentation Airlocks and 2 Pcs Bored Rubber Bungs Brewing Airlock for Home Brew Beer Wine Making- Plastic & Rubber
- Standard Demijohn
£6.69
Pros
- Handy multipack for brewers running several vessels at once
- Simple bubble-style airlocks are easy to read and clean
- Very low cost entry point for fermentation monitoring
Cons
- Basic plastic construction compared to glass airlocks
#4 Pick
Brewing Mate 2 x Demijohn Airlock and Bung Set, Bubbler Air Lock for Home Brewing- Plastic & Rubber
- Standard Demijohn
£9.99
Pros
- Set of 2 bubbler airlocks with demijohn bung and grommet included
- Keeps airborne bacteria out while fermentation gases escape
- Works with both demijohns and fermenting buckets
Cons
- Rubber bung fit can vary slightly between demijohn necks
#5 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
#6 Pick
2 Pack Airlocks and Bored Rubber Bungs- Rubber & Plastic
- Standard Demijohn
£7.78
Pros
- Amazon Choice pick with a very large review base
- Simply add water to view fermentation bubbles clearly
- Fits bored rubber bungs and fermenting bin lids
Cons
- Basic 2-pack only, may need more for multiple vessels
#7 Pick
3x Bungs & Bubbler Airlocks - Demijohn Rubber Cork & Air Lock - Beer Wine Cider- Rubber & Plastic
- Standard Demijohn
£7.95
Pros
- Pack of 3 bored rubber bungs and bubbler airlocks in one set
- Pre-drilled bungs fit snugly into standard demijohns
- Lets you keep an eye on fermentation progress at a glance
Cons
- Small review count so far
#8 Pick
FORYNXHWIN 4 x Demijohn Airlock and Grommets Set, Bubbler Air Lock for Home Brew & Winemaking- Plastic
- Standard Demijohn
£7.99
Pros
- Set of 4 airlocks and grommets covers multiple demijohns at once
- High-transparency design makes fermentation easy to monitor
- Reusable and simple to clean between batches
Cons
- Small review count so far
FAQ
What size is the demijohn?+
The demijohn has a capacity of 5 gallons (approximately 20 litres). This provides ample space for fermentation, allowing for significant head retention and maturation time.
What material is the demijohn made from?+
The demijohn is constructed from high-density polyethylene (HDPE), a food-grade plastic known for its durability, chemical resistance, and ability to maintain temperature stability – essential for fermentation.
Does this kit include sanitizing solutions?+
No, the kit focuses solely on the fermentation equipment. You will need to purchase separate sanitizing solutions like potassium metabisulfite or Star San to thoroughly clean and sanitize all components before use.
What kind of yeast is suitable for this kit?+
A general-purpose wine yeast, such as EC-1118 or Red Star Premier, would be appropriate. Ensure you select a yeast strain compatible with the type of fruit you're fermenting to avoid off-flavours.
How do I use the airlock?+
The airlock is filled with water (or sanitizing solution) and sits at the top of the demijohn, allowing carbon dioxide to escape during fermentation while preventing oxygen from entering. Regularly check and refill as needed.
What temperature should I ferment at?+
Most fruit wines ferment best between 18°C - 24°C (65°F – 75°F). Maintaining a stable temperature within this range is crucial for consistent results.
Can I use this kit for cider making?+
Yes, you can absolutely use this kit for cider. However, cider tends to ferment quicker than wine, so monitor it closely and consider using a lower initial gravity to prevent over-carbonation.
What is the stainless steel paddle for?+
The stainless steel paddle is used to gently agitate the liquid during fermentation, ensuring proper oxygen distribution and yeast contact – promoting healthy cell growth and flavour development.
How often should I check the temperature?+
Monitor the temperature at least twice a day, particularly during the initial stages of fermentation. Fluctuations in temperature can significantly impact the fermentation process and the final product's quality.
What is the best way to clean the demijohn between uses?+
Thoroughly wash the demijohn with hot water and a food-safe detergent. Follow this with a sanitizer like potassium metabisulfite or Star San, ensuring all surfaces are covered for the recommended contact time.