Universal Barrel Breathable Bung | CellarScience®

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