Equipment

Tapered design fits most oak barrels and variable volume tank lids. Made from easy-to-clean, sanitizable silicone. Provides a tight, leak-proof seal for barrels and tanks. This solid silicone bung from CellarScience will provide a tight fit and secure seal to your oak barrel or variable volume tank lid. Made from pliable silicone for a great seal and is easy to clean and sanitize. Tapered design ensures it will fit most oak barrels as well as the hole in most variable volume lids. Top measures 2.5" including flange, 2.25" excluding flange. Tapers to 1.75" diameter at bottom.

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Dual Functionality: Acts as both a stopper and an airlock, allowing CO2 to escape while preventing oxygen and contaminants from entering, ensuring optimal fermentation conditions. Versatile Fit: Compatible with a wide range of containers, including 3, 5, 6, and 6.5-gallon carboys, 1-gallon bottles, growlers, and 500 mL flasks, replacing multiple stopper sizes. Ideal for Wine and Beer Ferments: Breathable stoppers are a popular choice in commercial wineries and perfect for beer fermentation, it creates a vacuum if the wort cools, preventing contamination from water airlocks. A breathable Silicone stopper that acts as both a stopper and an airlock. Unique design allows CO2 pressure to escape but keeps Oxygen and airborne contamination out. This quickly became our stopper of choice for wine, and is a popular style used by numerous commercial wineries. Also has great application for beer ferments: It will create a vacuum if fermenting wort cools (as opposed to pulling water in from your traditional airlock.) Airtight seal is great for extended fermented lager when CO2 production is still present but very slight. Fits 3, 5, 6 & 6.5 gallon glass carboys, 1 gallon bottles, growlers, and 500 mL flasks. Replaces Stopper Sizes #6, #6.5, #7, #8 Stopper Measurements: 0.94" x 1.48" (24 mm x 37.5 mm) The flapper stopper protrudes roughly 2.5" from the stopper to allow for easy assembly Other available sizes include the Universal Breathable Bung and the Breathable Barrel Bung. All three size options can be purchased in one complete bundle with the Breather Bung Pack.

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Effortless Bung Removal: The ridge design ensures easy and hassle-free removal of the bung, simplifying barrel management. Effective Airlock System: Acts as an airlock, allowing CO2 to escape while keeping oxygen out, making it perfect for fermentation processes. Versatile Fit: Compatible with 30- and 60-gallon barrels, Variable Volume tanks, and 2" tri-clamp ferrules, offering flexibility across various setups. Multi-Size Replacement: Replaces stopper sizes #10, #11, and #12, with precise measurements for a perfect fit and easy assembly. We recently discovered this premium breathable silicone barrel bung and were immediately impressed with its robust design and features. To start with, the ridge really helps make bung removal effortless. The bung acts as an airlock and allows the release of CO2 while maintaining a seal against oxygen coming in. This makes the bung ideal for alcoholic or malolactic fermentation in barrels or tanks. Fits 30- and 60-gallon barrels as well as the hole in the lid of most Variable Volume tanks! Also fits perfectly in a 2" tri-clamp ferrule Replaces Stopper Sizes #10 , #11, #12 Stopper Measurements: 1.65" x 2.19" (42 mm x 55.5 mm) The flapper stopper protrudes roughly 2.5" from the stopper to allow for easy assembly Other available sizes include the Breathable Carboy Bung and the Universal Breathable Bung. All three size options can be purchased in one complete bundle with the Breather Bung Pack.

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Secure Fit: Designed with a ridge and gentle taper to prevent slipping or being sucked in, ensuring a reliable seal during use. Self-Sealing Vent: Equipped with vent holes that allow air to escape but prevent it from entering the fermenter. Easy Maintenance: Simple to clean and sanitize, making it highly convenient for repeated use. Replaces stopper sizes #8 and #9 This CellarScience Bung has a ridge to keep it from getting sucked in and self-sealing vent holes to let air out but not in. They have a gentle taper, so they don’t slip out during use. They are also very easy to clean and sanitize. Replaces Stopper Sizes #8, #9 Stopper Measurements: 1.36" x 1.89" (34.5 mm x 48 mm) The flapper stopper protrudes roughly 2.5" from the stopper to allow for easy assembly Other available sizes include the Breathable Carboy Bung and the Breathable Barrel Bung. All three size options can be purchased in one complete bundle with the Breather Bung Pack.

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Designed to fit 3 to 6.5-gallon glass carboys and 500ml flasks, making it ideal for a variety of storage needs. Ribbed body and ridge prevent slipping or being sucked in, ensuring a reliable seal during long-term storage. Despite its ribbed design, this silicone bung is easy to clean and sanitize for hassle-free use. Solid Silicone bung that will fit a 3, 5, 6 or 6.5 gallon glass carboy or 500ml flask. A solid stopper is the most reliable way to keep oxygen out for long term storage. This bung has a ridge to keep it from getting sucked in when temperatures cool. It also features a ribbed body it doesn't slip out during use. Even though it isn't perfectly smooth like some other stoppers, it remains easy to clean and sanitize. The top measures 1.5" wide and the bottom is 1.13" wide. While the FE592 carboy stopper is a great, economical choice, you may also want to check out our premium, silicone carboy hood FE496 as well. Working as both a solid or a breathable bung (depending on how the plug is set), the FE496 is like getting two bungs in one!

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Not sure what bung is right for you? We got your back! Get all the Breathable Bungs with this complete set. Includes: Breathable Carboy Bung Breathable Universal Bung Breathable Barrel Bung Breathable Bung for Glass Carboys A breathable Silicone stopper that acts as both a stopper and an airlock. Unique design allows CO2 pressure to escape but keeps Oxygen and airborne contamination out. This quickly became our stopper of choice for wine, and is a popular style used by numerous commercial wineries. Also has great application for beer ferments: It will create a vacuum if fermenting wort cools (as opposed to pulling water in from your traditional airlock.) Airtight seal is great for extended fermented lager when CO2 production is still present but very slight. Fits 3, 5, 6 & 6.5 gallon glass carboys, 1 gallon bottles, growlers, and 500 mL flasks. Replaces Stopper Sizes #6, #6.5, #7, #8 Stopper Measurements: 0.94" x 1.48" (24 mm x 37.5 mm) Universal Breathable Bung This CellarScience Bung has a ridge to keep it from getting sucked in and self-sealing vent holes to let air out but not in. They have a gentle taper, so they don’t slip out during use. They are also very easy to clean and sanitize. This a perfect fit for a 1.5” TC ferrules, Fermonsters, and Vintage Shop Plastic carboys. Replaces Stopper Sizes #8, #9. #10 Stopper Measurements: 1.36" x 1.89" (34.5 mm x 48 mm) Breathable Barrel Bung We recently discovered this premium breathable silicone barrel bung and were immediately impressed with its robust design and features. To start with, the ridge really helps make bung removal effortless. The bung acts as an airlock and allows the release of CO2 while maintaining a seal against oxygen coming in. This makes the bung ideal for alcoholic or malolactic fermentation in barrels or tanks. Fits 30- and 60-gallon barrels as well as the hole in the lid of most Variable Volume tanks! Also fits perfectly in a 2" tri-clamp ferrule Replaces Stopper Sizes #10 , #11, #12 Stopper Measurements: 1.65" x 2.19" (42 mm x 55.5 mm) The flapper stopper protrudes roughly 2.5" from the stopper

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