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Premium Breathable Silicone Bung for Barrels and Variable Volume Tanks
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We recently discovered this premium breathable silicone barrel bung and were immediately impressed with its robust design and features. To start with, the built in tabs really help make bung removal effortless. But where the bung really shines is in its two-piece design. When set to the open position, 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. When fermentation is over and you no longer want the bung to "breathe" out, you just push the center cap into the bung to create a firm seal and the FE497 becomes a solid stopper!

Fits most 30 and 60 gallon barrels as well as the hole in the lid of most Variable Volume tanks!

tapers from 1 7/8" to 2 1/4" diameter

Item # FE497
Shipping Eligible for Free Shipping Program
Availability California - In Stock
Pennsylvania - In Stock
Weight 0.25LBS
Community Q&A

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Browse 1 question Browse 1 question and 13 answers
Why did you choose this?
MoreFlavor Store
cause they work!
Joseph B on Oct 19, 2018
Great for venting and fermentation. Dual purpose product and easy to clean.
Michael P on Jul 20, 2018
cause they work!
Joseph B on Oct 19, 2018
They are awesome
Mason I on Sep 20, 2018
Great for venting and fermentation. Dual purpose product and easy to clean.
Michael P on Jul 20, 2018
Brent J on Jul 9, 2018
perfect fit for most 5 gallon barrels. work great.
Joseph Liston on Jun 26, 2018
Best ones I've found
Paul P on Jun 14, 2018
recommended by fellow brewers.
Valued C on May 23, 2018
They are totally metal
Joseph B on May 19, 2018
Barrel aging beers
Dietrich D on Apr 3, 2018
best bung
Tom C on Mar 27, 2018
I needed an airlock for some barrel-aging. These have the best design.
James S on Mar 21, 2018
have barrels that need this
Valued C on Mar 16, 2018
back up for var. vol.
Bradley M on Feb 17, 2018
They are awesome
Mason I on Sep 20, 2018
Brent J on Jul 9, 2018

4.8 / 5.0
11 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
works as descibed. fits snuggly in the 3, 59 gallon wine barrels I am using.
September 12, 2018
2 months ago
Great idea
These bungs work great and eliminate the need for bubblers on my still fermenting barrels.
July 20, 2018
4 months ago
Great for barrels
These are great for spirit/wine barrels 15G or larger. Easy to clean though they do get stained over time.
April 2, 2018
7 months ago
love them
Can't live with out them, had other silicone bungs pop out during an unexpected secondary fermentation. well worth the price to prevent blown out end caps
February 14, 2018
9 months ago
Great Product
The Bungs fit great! It is always nice to know it will release any pressure if any fermentation takes place, no barrel explosion potential.
February 9, 2018
10 months ago
Great product
Fit perfectly. Easy to clean. My new go-to bung.
January 30, 2018
10 months ago
Wooden Cask, Averill House Vineyard
We gave these a shot on two cask, so easy to use. Not only do they fit great but interim tasting is easy with the center vent. Smacked it in with a mallet then popped the center piece in for a fabulous fit.
January 26, 2018
10 months ago
Best Bung
I now use these on all my barrels. Supper easy to use and works well. Use them open or closed.
January 25, 2018
10 months ago
works great in brewery barrels
Perfect in 225L wine barrels and 200L liquor barrels - allows venting when needed.
January 31, 2017
Great bung that allows venting!
Not too much to be said about this bung, but it works great in the 225L wine barrels and 200L whiskey barrels we use in the brewery. The vent plug comes in extremely handy especially for finishing fermentations in the barrel, and doesn't seem to have an effect on oxygen permeability as far as I can tell.
March 17, 2014