Manage active primary fermentation, execute seamless secondary settling, and store fine finished liquors confidently with our Professional 5-Litre Glass Screw-Top Demijohn Carboy Series. Specifically engineered to provide a practical and highly efficient sealing solution for residential homebrewers, vineyard allotment growers, and traditional mead makers, this trade-grade vessel utilizes a robust threaded closure to seal out contaminants and lock in batch quality.
Select Your Target System Component & Quantity Configuration:
Available across 3 progressive component layouts and multiple bulk multi-buy pack configurations to cleanly scale your harvest volumes or kitchen micro-brewery lines. Please choose your target hardware combination from the options variations menu:
• Variant 1 (Screw-Top Demijohn Only): Heavy-duty 5L glass threaded-neck carboy with an integrated handle and high-durability plastic screw cap.
• Variant 2 (Demijohn with Airlock & Bung): Adds a custom-fit, bored rubber stopper bung and a classic optical-clear S-type bubble gas airlock.
• Variant 3 (Full Master Kit with Syphon Tube): Adds the 5L Threaded Demijohn, Sealing Bung, S-Airlock, PLUS a dedicated length of flexible, food-safe PVC racking hose.
Technical Profile & Kit Configuration Matrix:
| Selected Hardware Profile |
Included Component Module Breakdown |
Primary Operational Zymological Benefit |
| Variant 1: Screw-Top Only |
5L Glass Carboy with integrated carry loop & threaded plastic cap |
Long-term maturation runs, continuous spirit infusing, bulk liqueur storage, or display uses. Perfect reusable solution. |
| Variant 2: Carboy + Airlock Set |
5L Glass Carboy, Threaded Sealing Cap, Bored Rubber Stopper, Acrylic S-Type Airlock |
Active primary or secondary anaerobic fermentation of wine musts, beer worts, and country ciders. Threaded cap seals tight post-fermentation. |
| Variant 3: Full Master Bundle |
5L Glass Carboy, Screw Cap, Bored Rubber Stopper, Acrylic S-Type Airlock, PVC Syphon Hose |
Complete turn-key brewing cycle, vigorous activity monitoring, and clear, sediment-free transfer or bottling management. |
Advanced Product Engineering Performance Features:
Precision Threaded Airtight Cap
The robust plastic screw cap features cleanly engineered threads that catch seamlessly on the molded neck of the demijohn. This continuous thread track forms a fast, highly secure airtight seal that prevents fluid leaks and halts ambient oxidation.
High-Purity Inert Glass Composition
Forged from premium glass compounds that completely resist high ethanol levels, complex fruit acids, and hot liquids. The smooth, non-porous interior leaves no rough micro-pockets to trap residues or harbour wild spoilage bacteria.
Anaerobic Gas Venting Matrix (Variants 2 & 3)
The sanitary rubber stopper bung establishes an air-impermeable fit inside the neck opening. Combined with a water-filled bubble airlock, it lets active carbon dioxide ($CO_2$) vent safely while stopping incoming airborne contaminants or fruit flies from spoiling the wash.
Integrated Anti-Slip Glass Transport Loop
Molded with a structural glass carry handle right below the collar. This provides an incredibly solid pivot grip when adjusting placement, swirling yeast starters, or pouring off samples, minimizing the risk of slips or breakage.
The Airtight Threaded Advantage over Standard Pails:
Standard plastic brewing pails or soft carboys are slightly oxygen-permeable over long periods and scratch easily during washing. These microscopic scratches can hold onto stubborn wild bacteria that survive standard sanitizers, ruining future batches of wine or beer. Furthermore, slow oxygen ingress during secondary conditioning entirely dampens complex aroma notes and turns fine washes sour. Our heavy-wall threaded glass demijohns create an absolute, non-porous oxygen barrier. Clear visual walls let you audit yeast action, color changes, and sediment depth perfectly without popping the lid and disturbing the anaerobic environment.
Professional Glass Care & Operational Safeguards:
- Thermal Shock Warning: Avoid subjecting the structural glass to rapid temperature drops or sudden heat spikes (such as pouring near-boiling water into a cold vessel), as extreme thermal differences can crack or fracture the casing. Always wash using lukewarm water mixed with standard home-brew disinfectants.
- Safe Transport Protocol: While the integrated glass loop handle is an excellent asset for layout adjustments and positioning, never rely on it solely to support the full weight of a completely filled carboy. Always support the heavy base with your second hand during transit.
- Liquid Racking (Variant 3): Use the included flexible PVC syphon tube to transfer liquids smoothly from one vessel to another, ensuring a clear draw that leaves heavy floor trub undisturbed.
Technical Profile & Specifications:
- Product Profile: Threaded Screw-Top Glass Demijohn Fermentation and Storage Carboy
- Volumetric Capacity Limit: 5.0 Litres per vessel unit
- Chassis Casing Colour: 100% Optical Transparent Clear
- Sealing Closure Assembly: High-density threaded plastic screw cap
- System Compatibility: Perfect for standard wine bungs, corks, siphons, and automated hydrometer sensors