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Drilled Rubber Stopper for Fermentation

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Drilled Rubber Stopper for Fermentation

$0.75 – $4.99

Drilled Rubber Stopper For Fermentation

  • Food Grade Durable Material
  • Drilled Hole Fits All Standard-Sized S- Airlock, 3 Piece Airlock, Triple Bubbler, etc. 
  • Creates an Airtight Seal Keeping Oxygen Out.
  • Many Bung Sizes to Fit a Variety of Fermenter Openings.
  • All Drilled Bungs Sizes Available: #2, #3, #5.5, #6, #6.5, #7, #7.5, #8, #8.5, #9, #9.5, #10, #10.5, #11, #13
  • Allows for Proper Fermentation While Preventing Contamination.
  • Easy to Clean and Can be Used Repeatedly.
Delivery by Jan 20th, 2025 - Jan 24th, 2025

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Drilled Rubber Bung Stoppers for Fermentation

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Drilled Rubber Stopper Home Brewing
Rubber Bung
Bottle Rubber Stopper
Rubber Wine Stopper

Rubber bungs are used when fermenting to completely seal or create an airtight barrier between the airlock and opening of your fermenter.

Depending on your needs you have two options: Solid Rubber stoppers create a complete seal while drilled rubber stoppers have a hole drill into them which fits a standard size airlock or a small blow-off tube.

Drilled rubber stoppers come in assorted sizes and are required to create an airtight seal in most fermentation. Our food-grade drilled stoppers are made of solid rubber with a pre-drilled hole in the center. This hole is sized to fit all standard-sized airlocks and this blow-off tube. The rubber bung is tapered for a better seal and holds the airlock securely in place. The curved lip also stops the bung from accidentally sliding into your fermenter. These stoppers have many uses in fermentation which include beer brewing, cider, and winemaking, just to name a few.

VARIETY OF FITS

Drilled rubber stoppers fit into a variety of different brewing vessels, and each stopper measurement is specified in the product pictures.

How does the Drilled rubber stopper work?

Plug the stopper into the mouth of your carboy or fermenter and then insert the airlock. This will create an airtight seal that prevents oxygen contact during fermentation. The airlock will then let co2 escape while preventing oxygen from going back into your brewing vessel.

An Essential Resource For Homebrewers

Drilled Rubber Stopper

The drilled rubber stopper is one of the most basic tools for homebrewers of all experience levels to have on hand. The rubber stoper fits into your fermentation vessels to create an airtight seal for your fermentations and homebrews.

What size rubber stopper do I need for my fermenter?

Stoppers come in various sizes and are sized by number but what do these numbers mean? To determine the correct stopper size, measure the diameter of the mouth of your carboy or fermenter, and compare it to the rubber stopper size chart below. This chart will help you quickly determine which stopper you need by most popular brewing equipment and provides a diameter for each stopper style in inches.

#2
#3
#5.5
#6
#6.5
#7
#7.5
#8
#8.5
#9.5
#10
#10.5
#11
#13

Drilled For Standard Sized Airlock

Use Your Preferred Airlock Style

The drilled hole for the rubber stoppers is sized to fit all standard-sized airlocks, so you can use your preferred style, whether it’s a 3-Piece airlock or S-Style, for all your home fermentations.

Drilled Silicone Stopper

Rubber Stopper Size Chart

Rubber Stopper Bung Size Chart What size to use wine beer cider

Stopper Type Compatible With:

  • No. 2 Stopper – Fits standard beer and wine bottles.
  • No. 5 Stopper – Fits Big Mouth Bubbler® EVO 2 w/screw-on lid (older EVO 2 models) & Little BMB.
  • No. 6 Stopper (Drilled or Solid) – Fits standard 1 Gallon Jugs.
  • No. 6.5 Stopper (Drilled or Solid) – Fits Glass carboys, Big Mouth Bubbler® plastic (5 or 6.5 gallons), or EVO 2 w/ Universal Lid. The ideal fit is the 6-gallon carboy.
  • No. 7 Solid Stopper – Fits 5 Gallon glass carboys
  • No. 10 Solid Stopper – Fits Bubbler® 5 or 6 gallon
  • Small Universal Stopper (Drilled or Solid) – Fits  Glass Carboys (3, 5, 6, 6.5), Big Mouth Bubbler® Plastic 5 or 6.5-gallon or EVO 2 w/ Universal Lid.
  • Medium Universal Stopper (Drilled or Solid) – Fits Bubbler® 5 or 6-gallon.

Our Mission Is Your Success

At Fermentaholics, we’re dedicated to making your fermentation journey a success. We’re here to help at every step of the way. No matter your question or concern, we’re here to provide the correct guidance and support to help you accomplish your fermentation goals. From batch to batch and brew to brew, we’ve got your back.

Make All Your Fermented Favorites: Endless Small Batch Fermentations
By utilizing this rubber stopper with the airlock of your choice, you have now unlocked the world of small-batch fermentation. Make your favorite ales and lagers, experiment with winemaking, make your famous batches of kimchi and sauerkraut, and much, much more all with this simple tool.

Make All Your Fermented Favorites: Endless Small Batch Fermentations

By utilizing this rubber stopper with the airlock of your choice, you have now unlocked the world of small-batch fermentation. Make your favorite ales and lagers, experiment with winemaking, make your famous batches of kimchi and sauerkraut, and much, much more all with this simple tool.

Shop our Full Line of Supplies and Ingredients

Simplify Fermentation with S-Shaped Airlocks
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Simplify Fermentation with S-Shaped Airlocks

Designed for use with a drilled rubber stopper or grommeted lid, these airlocks are great for making beer, wine, sauerkraut, pickles, and more—optimal results in your DIY fermentation projects.
S-Shaped Airlocks

Fermentaholics Triple Scale Hydrometer Test Kit

Accurate and easy to read, the triple scale hydrometer will help ensure you get your brew exactly where you want it and in whatever measurement you prefer
Hydrometer Test Kit

2 Pack One Gallon Glass Jars

One-gallon glass jar are great for gallon batches, Plastic lid that is great for using to store your brew.
2 1-Gal Jars

3 Pack Fermentation Adhesive Strip Thermometer

Wide Range Adhesive Temperature Strips - Displays Temperatures Ranges Between 46 - 93 F or 8 - 34 C. Perfect Brew, Every Time! Never Let Temperature Get In The Way Of Your Brew Again.
Adhesive Strip Thermometer

Bottling Kit - Includes 7 Glass Flip Top Bottles

Includes 7 Glass Flip-top Style Bottles, Perfect For Bottling And Flavoring A 1-gallon Batch Of Kombucha, Vinegar, Oil, Beer, Wine, Kefir, Mead Or Whatever You're Fermenting At Home!
Swing Top Bottling Kit

Kombucha Instant Read pH Strips

Fermentaholics Fermentation & Kombucha pH Test Strips Were Designed To Instantly and Accurately Test The pH Of Kombucha, Beer, Wine, Mead, Vinegars, Or Any Other Liquid In The 0 - 6 pH Spectrum.
100-Pack pH Strips

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    Product Details

    Drilled Rubber Stopper For Fermentation

    • Food Grade Durable Material
    • Drilled Hole Fits All Standard-Sized S- Airlock, 3 Piece Airlock, Triple Bubbler, etc. 
    • Creates an Airtight Seal Keeping Oxygen Out.
    • Many Bung Sizes to Fit a Variety of Fermenter Openings.
    • All Drilled Bungs Sizes Available: #2, #3, #5.5, #6, #6.5, #7, #7.5, #8, #8.5, #9, #9.5, #10, #10.5, #11, #13
    • Allows for Proper Fermentation While Preventing Contamination.
    • Easy to Clean and Can be Used Repeatedly.

    Additional information

    Weight0.1 lbs
    Dimensions2 × 2 × 2 in
    Size

    #2 Drilled Rubber Stopper, #3 Drilled Rubber Stopper, #5.5 Drilled Rubber Stopper, #6 Drilled Rubber Stopper, #6.5 Drilled Rubber Stopper, #7 Drilled Rubber Stopper, #7.5 Drilled Rubber Stopper, #8 Drilled Rubber Stopper, #8.5 Drilled Rubber Stopper, #9 Drilled Rubber Stopper, #9.5 Drilled Rubber Stopper, #10 Drilled Rubber Stopper, #10.5 Drilled Rubber Stopper, #11 Drilled Rubber Stopper, #13 Drilled Rubber Stopper

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