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Stoppers & Airlocks

Keep your precious homebrew safe from the ravages of oxygen and pests with this wide assortment of stoppers and airlocks. We carry stoppers for any size fermentor available.

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  1. Airlock 3 piece type
    $2.49

    The 3-Piece airlock is the best choice for the primary fermenter, since it comes apart for easy cleaning in the event of a blow-off. Fill to the line with boiled water or sanitizer to create a closed fermenting system that allows CO2 to escape, but does not allow air back in to contaminate your beer or wine. Learn More
  2. Red_Replacement_Rubber_Grommet
    $5.99

    Rubber Grommets seem to run off when you need them most. Make sure to have an extra, or two, on hand, just in case. This is the grommet that fits in all of our pre-drilled plastic lids with a 5/8" diameter hole. Learn More
  3. No. 2 Stopper - Drilled
    $6.99

    Drilled gum rubber stopper. Used to provide a positive seal; works well with standard beer bottles. Drilled hole is compatible with standard airlocks. Learn More
  4. 38 mm Screw Cap with Hole
    $2.49

    This reusable 38 mm screw cap will fit our 1 gallon and 1/2 gallon jugs and CBD Growlers. It is made of plastic and has a hole in the middle, which works best with our 3 piece airlock - item 7010. Perfect for small batch experiments or yeast starters. Learn More
  5. S Bubble Airlock
    $1.99

    This S-bubble airlock is the preferred choice for secondary fermenters, as it allows you to monitor the pressure in the fermenter. Fill to line with boiled water or sanitizer to create a closed system, which allows CO2 to escape, but doesn't allow air back in to contaminate your wine or beer. Learn More
  6. Small Universal Stopper - Drilled
    $1.49

    Drilled to accept an airlock (#7008 and 7010).

    Universal bungs have a longer taper than standard rubber stoppers, for snugger fit and better seal — plus a lip prevents bung from falling into carboy.

    This drilled universal bung will work with glass carboys.

    Learn More
  7. No. 6.5 Stopper - Drilled
    $2.49

    Drilled gum rubber stopper. Used to provide a positive seal on fermentors. Drilled hole is compatible with standard airlocks.

    The #6.5 stopper works well with our glass carboys and Big Mouth Bubbler PET fermentor.

    Top Diameter: 1.339"

    Bottom Diameter: 1.063"

    Learn More
  8. Medium Universal Stopper - Drilled
    $2.99

    Plastic bung with a drilled hole for airlocks. This universal style has a longer taper than rubber stoppers, for a snug fit and better seal. Fits plastic carboys, Better Bottles and Bubbler PET fermentors.

    The drilled hole fits an airlock (#7008 or #7010) for fermentation.

    Top Diameter: 2.375"

    Bottom Diameter: 1.656"

    Learn More
  9. Small Universal Stopper - Solid
  10. No. 5 Stopper - Drilled
    $2.19

    Drilled gum rubber stopper. Used to provide a positive seal on fermentors. Drilled hole is compatible with standard airlocks. Compatible with: older models of Big Mouth Bubbler® EVO 2 w/screw-on lid & Little Big Mouth Bubbler® Learn More
  11. No. 6 Stopper - Drilled Top
    $2.29

    Drilled gum rubber stopper. Used to provide a positive seal on fermentors. Drilled hole is compatible with standard airlocks.

    Top Diameter: 1.26"

    Bottom Diameter: 1.024"

    Learn More
  12. No. 6 Stopper - Solid
  13. No. 6.5 Stopper - Solid
  14. No. 7 Stopper - Drilled
  15. Stopper Thermowell
    $36.99

    Use in conjunction with a Digital Temperature Controller and an Electric Fermentation Heater (#40535) for complete control over fermenting temperatures in cool environments. Fits 3, 5, 6, or 6.5 gallon glass carboys. Not compatible with Better Bottles. Compatible with the Thermostar® and Johnson Digital temperature controllers.. Learn More
  16. Size 10 Stopper - Drilled

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