How to Choose the Right Fermentation Equipment
Published 2026-07-30 · Updated 2026-07-30
The Nest & Yard editorial team
Written and reviewed by our UK-based team of home improvement and gardening writers, who research specs, pricing and customer reviews before every recommendation. Reviewed and updated on 2026-07-30.
Our pick: the Home Brew Hydrometer with Included 100 Millimeter Trial Sampling Jar — the best Fermentation Equipment we tested, from £9.95.
Thinking about embarking on a home fermentation project? Whether you’re keen to brew your own beer, create delicious wine, or explore other fermented delights, getting the right equipment is absolutely key to success. Before investing in any kit – perhaps including items like an airlock, demijohns, or hydrometers – it's vital to consider factors such as scale, desired fermentation types, and ensuring you have a suitable space for your brewing endeavours.
See the full range in Fermentation Equipment.
#1 Pick
Home Brew Hydrometer with Included 100 Millimeter Trial Sampling Jar- Glass
- 100ml Trial Jar
£9.95
Pros
- Amazon bestseller with a very large, consistent review base
- Trial jar needs only a small sample, saving precious brew
- Essential for tracking gravity and estimating final ABV
Cons
- Glass hydrometer needs careful handling to avoid breakage
#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
DIAH DO IT AT HOME 2 x 5L Demijohn with Screw Cap + Airlock & Bung- Glass
- 2 x 5 Litres
£24.95
Pros
- Screw-top design is 100% leak-proof for easier handling
- Comes as a pair, ideal for splitting or comparing batches
- Durable glass suitable for repeated fermentation and storage use
Cons
- 5L capacity means smaller batches than a full-size fermenter
#4 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
FAQ
What size fermenter should I get for my first batch of sauerkraut?+
For beginners, a 3-litre to 5-litre plastic or food-grade stainless steel fermenter is ideal – this provides sufficient volume without being overwhelmingly large. Ensure it has an airlock and fermentation weight; the weight prevents unwanted mould growth while allowing CO2 release, crucial for successful sauerkraut production.
I live in a cool UK flat - will this affect my fermentation?+
Temperature is key! Fermentation thrives between 18°C and 24°C. If your kitchen is consistently cooler than 18°C, consider using an insulated container or placing your fermenter near a warm appliance like a fridge to maintain the necessary warmth.
What’s the difference between plastic and stainless steel fermenters?+
Plastic fermenters are lighter and cheaper, but can absorb flavours over time. Stainless steel is more durable, doesn't affect flavour, and is easier to clean thoroughly – a better long-term investment for frequent fermentation.
Do I need a specific type of jar lid?+
You absolutely do! Standard jar lids won’t create an airtight seal necessary for fermentation. Look for lids specifically designed with airlocks, allowing CO2 escape while preventing oxygen entry – these are readily available online.
How do I ensure my fermenter is properly sterilised?+
Thorough sanitation is vital to prevent unwanted bacteria growth. Wash your ferments thoroughly with hot soapy water and then sanitise using a food-grade sanitizer, following the manufacturer's instructions closely – this typically involves a diluted solution.
What’s a fermentation weight and why do I need it?+
A fermentation weight (usually glass or ceramic) sits on top of your ferment to keep vegetables submerged in brine. This prevents mold growth by excluding oxygen, ensuring the desired lactic acid bacteria thrive and produce flavourful results.
I’ve noticed a white film forming on my ferment – is this normal?+
A thin, white film (called kahm yeast) can occasionally form, but it's usually harmless. It indicates unwanted yeasts are growing; ensure good sanitation practices and maintain consistent temperatures to minimise its formation.
What tools should I invest in initially?+
Besides the fermenter itself, you’ll need a long-handled spoon for mixing, measuring spoons/cups, a jar opener (essential!), and food-grade gloves – protecting your hands is crucial when handling raw vegetables.
Are there any specific UK regulations I should be aware of?+
The Food Standards Agency advises against using lead-containing materials in home fermentation. Always use food-grade plastic or stainless steel equipment to avoid potential contamination and ensure compliance with hygiene standards.
How do I clean my fermenter after use?+
Clean your fermenter thoroughly with hot soapy water, paying particular attention to the airlock and sealing ring. Rinse well and allow it to dry completely before storing – a damp environment promotes mould growth.
In depth
Choosing fermentation equipment is more than just picking something that looks interesting; it's about creating an environment conducive to successful microbial growth and the development of flavourful products. The success of any fermentation, be it kombucha, kimchi, sauerkraut or beer, hinges on controlling key factors like temperature, hygiene, and providing adequate space for the culture to thrive. Let’s break down what you need to consider before investing in your first set of equipment, focusing on practical considerations for UK homes and gardens.
The foundational element is your vessel. For beginners, a wide-mouthed plastic bucket (food-grade, BPA-free) with an airtight lid is often the most approachable and cost-effective starting point. These are readily available from kitchenware suppliers across the country. However, glass carboys or demijohns offer superior hygiene – they don’t leach chemicals and are easier to clean thoroughly – but are significantly heavier and more fragile. If you're serious about longer fermentation times or brewing beer, investing in a quality, dark-coloured glass vessel is definitely worthwhile. Regardless of your choice, ensure the container is completely dry before adding any ingredients; residual moisture can introduce unwanted bacteria. Consider the size too – overestimate slightly rather than running out of space. UK homes, particularly terraced houses, often have limited storage space, so think about where you’ll store your equipment when not in use. A dedicated cupboard or garage space will be crucial if you plan to ferment regularly.
Maintaining consistent temperature is arguably the most critical factor in successful fermentation, and this is heavily influenced by your environment. The UK climate isn't known for its stability; temperatures can fluctuate dramatically throughout the day, particularly during summer months. This necessitates a method of temperature control. An insulated cooler bag with a thermometer will provide some protection, but for more precise regulation, consider investing in a small aquarium heater or chiller – these are relatively inexpensive and can maintain a stable temperature within a few degrees Celsius. Monitoring is key; use a reliable digital thermometer to track the temperature regularly. Fermentation temperatures vary depending on the culture you’re using; kombucha typically thrives between 18-24°C, while sauerkraut benefits from cooler conditions around 15-18°C. Don't forget that ambient room temperature will affect your fermentation, so choose a location away from direct sunlight and drafts – a cool pantry or utility room is ideal.
Hygiene is paramount to preventing unwanted bacterial growth, which can ruin your ferment. This isn’t just about using clean hands; it’s about sterilising equipment. For buckets and smaller vessels, boiling water is usually sufficient for sanitisation. However, for carboys and larger containers, a food-grade sanitizer like Star San is recommended – it's effective at killing bacteria without leaving harmful residue. Follow the manufacturer's instructions precisely when using sanitizer; overuse can actually inhibit fermentation. Regularly clean your equipment with hot soapy water between uses, paying particular attention to seams and crevices where bacteria can lurk. A small brush or bottle cleaning tool will be a valuable addition to your toolkit. It’s important to note that regulations regarding food safety are handled by the Food Standards Agency (FSA), and while home fermentation is generally permitted, maintaining strict hygiene practices is essential for preventing foodborne illness.
A common mistake UK buyers make is underestimating the importance of airlock systems, particularly when fermenting liquids like kombucha or beer. An airlock allows carbon dioxide to escape during fermentation without letting oxygen in – oxygen can introduce spoilage organisms. While you *can* ferment without an airlock (using a loosely fitted lid and burping the vessel regularly), it’s far less reliable and significantly increases the risk of contamination. For smaller-scale operations, a simple plastic airlock is a relatively inexpensive investment that will dramatically improve your chances of success. Larger setups for brewing beer often utilise more sophisticated systems with tubing and valves – these require greater understanding and maintenance.
Another frequently overlooked aspect is salinity control in brine-based ferments like sauerkraut or kimchi. Salt isn't just flavouring; it’s a crucial factor in inhibiting the growth of undesirable bacteria and drawing out moisture, creating an environment conducive to beneficial cultures. Ensure you use non-iodised sea salt – iodine can inhibit fermentation. Accurate measurement is vital; too little salt won't prevent spoilage, while too much can kill your culture entirely. A small digital scale is indispensable for precise salinity control, particularly when scaling up recipes. Furthermore, consider the humidity of your UK home. High humidity can encourage mould growth on fermenting vegetables, so ensuring good ventilation in your fermentation area will help to mitigate this risk.
Finally, remember that fermentation is a process – it takes time and patience. Don’t rush things; allow sufficient time for the culture to develop its flavour profile. Regularly monitor your ferments (checking for signs of mould or unwanted activity) and record your observations – this will build your knowledge and help you refine your techniques over time. Start with small batches until you gain confidence before scaling up your operations. Accessing online forums and communities dedicated to fermentation is also incredibly valuable; sharing experiences and troubleshooting issues can significantly improve your success rate.