CellarScience® Universal Breathable Bung (Large) | Fits Barrels & Stopper Sizes #10–#12

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CellarScience® Universal Breathable Bung (Large): Barrel-Ready, Fermentation-Safe Perfect for Barrels, Tanks & Tri-Clamp Setups The CellarScience® Universal Breathable Bung (Large) is a premium-grade silicone stopper designed for large-scale fermentation systems. Whether you're using 30- or 60-gallon wine barrels, variable volume tanks, or tri-clamp vessels, this bung offers a secure and oxygen-blocking fit while effortlessly releasing CO2. Its flapper-style self-sealing vent system eliminates the need for a separate airlock, making it a favorite for both alcoholic and malolactic fermentations. A ridge around the body allows for easy removal—even after extended use in tight-fitting barrels. Key Features: Effortless Bung Removal: Ridge design allows for hassle-free removal from tight barrel holes or tank lids. Built-In Airlock Function: Vents CO2 during fermentation while keeping out oxygen and airborne contaminants. Versatile Compatibility: Works with barrels, variable volume tanks, and 2" tri-clamp ferrules. Fit & Compatibility: Replaces Stopper Sizes: #10, #11, #12 Stopper Dimensions: 1.65" x 2.19" (42 mm x 55.5 mm) Flapper Length: Protrudes approximately 2.5" for easy handling Trusted for Barrel Fermentations & Long-Term Aging This large CellarScience® breathable bung is the ultimate upgrade for professional or serious home winemakers, mead makers, and cider producers. It’s a dependable solution for maintaining a stable, low-oxygen environment throughout fermentation and barrel aging. Show more