Kitchen fermentation accessory that keeps ferments protected while allowing safe gas release. Quiet confidence for home vintners and small-batch brewers, with simple pieces that reduce anxiety during active fermentation. Is the Brewing Mate Demijohn Airlock and Bung Set the straightforward kit you need for reliable results?
⚡ At a Glance
- • Brewing Quality: Allows carbon dioxide to escape while blocking airborne bacteria
- • Best for: Home brewers making wine, cider, mead or kombucha with demijohns or buckets
- • Not ideal for: Brewers who prefer glass airlocks or non-standard vessel hole sizes
Two plastic bubbler airlocks come with a demijohn bung and a grommet for bucket use. Standard 17cm length and measured bung diameters fit most demijohns and 12mm bore lids.
Reliable fermentation seal - with silicone bung and grommet
Silicone bungs sit snugly in the demijohn neck, with a 32mm top diameter and 26mm bottom diameter for tapered fit. Grommet fits a standard 12mm bore in a fermenter lid to secure the airlock in buckets.
A tight seal keeps airborne contaminants out while letting fermentation gases escape, reducing risk of off-flavours or infections.
Low-breakage, everyday durability - with plastic bubbler construction
Airlocks are moulded from robust plastic rather than glass, giving greater resistance to knocks and drops during handling. Length is 17cm (6 inches), a common standard for household fermentation gear.
Plastic construction suits frequent use and busy kitchens, avoiding the hassle and cost of shattered glass replacements.
Versatile compatibility - thanks to standard sizing and included parts
Set includes two airlocks plus a demijohn bung and a grommet, making the pieces ready for both demijohns and fermentation buckets. Dimensions are chosen to match standard vessel fittings.
Useful for brewers swapping between vessels or updating older demijohns, so equipment works across several recipes and batches.
✨ The 4 Key Reasons for Brewing Mate Demijohn Airlock and Bung Set
- Silicone Bung - Reduces air ingress, improving fermentation safety and consistency.
- Plastic Airlock - Withstands drops and knocks, far less likely to shatter.
- Dual Set - Two airlocks included, ready for multiple vessels or replacements.
- Standard Sizing - Bung and grommet fit common demijohns and 12mm holes.
📋 Technical Details at a Glance
- Category: Kitchen, Fermentation Accessories
- Set Contents: Two airlocks, demijohn bung and grommet included
- Material: Plastic airlocks, silicone bung
- Airlock Size: 17cm / 6"
- Bung Diameter (Top): 32mm
❓ Frequently Asked Questions
Q: Are these airlocks suitable for both demijohns and fermentation buckets?
A: Yes, the set includes a demijohn bung plus a grommet so the airlocks can be used with demijohns or standard fermentation bucket lids.
Q: Will the plastic airlocks break easily compared with glass?
A: No, plastic construction is designed to withstand knocks and heavy wear, reducing the chance of breakage seen with glass alternatives.
Q: What sizes do the bung and grommet fit?
A: The bung measures 32mm at the top and 26mm at the bottom, while the grommet fits a standard 12mm bore hole in a fermenter lid.
🏆 Our Verdict
Home brewers using demijohns or fermentation buckets will find this kit directly useful. Durable plastic airlocks paired with silicone bungs and a grommet deliver a secure, low-maintenance fermentation setup. Good long-term value for regular brewers thanks to reliable seals and reduced breakage risk.
