#13 Silicone Bung / Stopper for some Large Blue Tanks and Kegs
Secure your largest batches with the #13 Ventilating Silicone Bung. Engineered for the oversized openings found on large blue plastic tanks and fermentation kegs, this stopper features a specialized one-way vent design. It allows high volumes of CO2 to escape safely while maintaining a 100% barrier against oxygen and outside contaminants. This eliminates the risk of 'suck-back' or carboy damage during temperature shifts, providing total peace of mind for long-term aging.
Oversized Precision Fit: Specifically tapered to fit large-format openings (2 3/16" bottom to 2 5/8" top), ensuring a deep, non-slip friction seal.
Integrated Pressure Relief: The built-in vent acts as a self-monitoring airlock, freeing you from checking water levels in traditional airlocks on your largest vessels.
Pure Medical-Grade Silicone: Crafted in the USA from 100% food-safe white silicone that is BPA-free and non-porous. It will not impart plastic odors or absorb flavors, ensuring your product remains pure.
Multiple Tooling Options: Available as a Ventilator for active fermenting, a Bored (with 3/8" hole) for standard airlocks, or a Solid Grab Ring for hermetic long-term storage.
