Standard Demijohn Capacity Products UK
8 products with capacity “Standard Demijohn”, spanning Home Brewing & Wine Making.
The term 'Standard Demijohn' refers to a reusable plastic container – typically 20 litres in capacity – originally designed for the bulk transport of liquids like wine, spirits and oils. Here in the UK, demijohns have remained incredibly popular across a surprising range of home & garden activities, far beyond their initial purpose. Many home brewers utilise them as primary fermentation vessels, providing an insulated environment ideal for yeast activity and temperature control; similarly, winemakers frequently employ them for ageing red wines due to their ability to maintain consistent temperatures and minimize oxygen exposure. Beyond these core applications, you'll find demijohns are used extensively for storing rainwater, preserving fruits and vegetables (particularly jams and chutneys), and even as quirky decorative elements within the home or garden.
When considering a standard demijohn, it’s crucial to check several key specifications. Firstly, the material is paramount – HDPE (High-Density Polyethylene) plastic is almost universally used due to its durability, resistance to chemicals, and ability to block light; avoid alternatives that might leach contaminants or degrade over time. Secondly, consider the closure mechanism - a good quality bung with an O-ring ensures an airtight seal essential for preserving contents, while a robust lid provides stability. Across different product types – from fermentation vessels to storage containers – look for reinforced construction and UV resistance, particularly if intended for outdoor use.
Ultimately, purchasing a standard demijohn is about finding the right balance of capacity, material quality, and closure security for your specific needs. While cheaper options exist, investing in a well-made demijohn will significantly increase its longevity and performance, making it a worthwhile addition to your home brewing kit, gardening supplies, or general storage solutions. Remember that while many products fall under this category, variations in size, colour and included accessories can dramatically affect their suitability for particular tasks – so careful research is key.
#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
Related attributes
FAQ
What exactly does ‘standard’ mean when referring to a demijohn?+
‘Standard’ primarily denotes the 20-litre capacity, which is the most common size and widely recognised across home brewing and storage applications within the UK. However, it also implies adherence to generally accepted manufacturing tolerances for dimensions, ensuring compatibility with various accessories and equipment designed for this container size.
How does a demijohn compare in price to other 20-litre containers?+
Demijohns are often competitively priced compared to purpose-built plastic storage bins of the same capacity. However, their specialised design – including airtight bungs and UV resistance – can justify a slightly higher initial investment, particularly if you plan on long-term use in demanding applications like wine fermentation.
Will I need any additional accessories for using a demijohn?+
Yes, absolutely. For home brewing, you’ll require a fermentation airlock and potentially a thermometer. For storage, consider an appropriate bung sealant and possibly a lid to protect the contents from dust and light; Amazon offers a wide range of compatible accessories.
What material is a demijohn usually made from?+
The vast majority of standard demijohns are constructed from HDPE (High-Density Polyethylene) plastic. This material is favoured for its exceptional chemical resistance, durability and ability to block UV light effectively, making it ideal for storing liquids and preserving their quality.
Are there different grades of plastic used in demijohns?+
Yes, while HDPE is the most common, some manufacturers might utilise slightly different formulations. Opting for a reputable brand with clear material specifications ensures you’re selecting a durable container suitable for your intended use; always check the product details on Amazon.
Can I use a demijohn for storing chemicals or cleaning products?+
While HDPE is resistant to many chemicals, it's not universally suitable. Avoid using demijohns for highly corrosive substances like strong acids or bases, and ensure proper ventilation if you’re storing any potentially volatile liquids.
How does the colour of a demijohn affect its use?+
Darker coloured demijohns (e.g., black or dark blue) offer superior protection from UV light, which is crucial for preserving wine and preventing oxidation; lighter colours are generally fine for storage but may require additional shading if stored outdoors.
What’s the best way to clean a demijohn after use?+
Thorough cleaning is essential. Use hot soapy water with a bottle brush, paying particular attention to the bung and lid. Rinse thoroughly and allow to dry completely before storing; ensure all traces of previous contents are removed.
Are there any specific risks associated with using demijohns for rainwater collection?+
Ensure the demijohn is clean before use and that it’s stored in a location protected from freezing temperatures, which could cause expansion and potential cracking. Regularly inspect the container for damage and discard if compromised to avoid contamination.
What are the common mistakes people make when buying a demijohn?+
People often overlook the importance of a good quality bung with an O-ring – a faulty seal can lead to airlock and spoilage. Additionally, neglecting to consider UV resistance for outdoor storage or choosing a low-quality plastic container that might degrade over time are common pitfalls.