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Medium Universal Stopper - Solid


SKU# 40669

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Plastic undrilled stopper. 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.

Top Diameter: 2.375"

Bottom Diameter: 1.656"


Availability: In stock

Solid Bung for Plastic Carboys

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  • Solid Bung for Plastic Carboys
  • Solid Bung for Plastic Carboys
Product Details

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 undrilled universal bung will work with plastic carboys, Better Bottles and Bubbler PET fermentors.

Top Diameter: 2.375"

Bottom Diameter: 1.656"

Not sure if this is the correct stopper for your purposes? Consult our stopper information table below:

Stopper TypeCompatible With:
No. 2 Drilled StopperStandard Beer bottles
No. 5 Drilled StopperBig Mouth Bubbler® EVO 2 w/screw-on lid (older EVO 2 models) & Little BMB
No. 6 Stopper Drilled or Solid1 Gallon Jugs
No. 6.5 Stopper Drilled or SolidGlass carboys, Big Mouth Bubbler® plastic (5 or 6.5 gallon) or EVO 2 w/ Universal Lid. Ideal fit is 6 gallon carboy.
No. 7 Drilled Stopper5 Gallon glass carboys
No. 10 Drilled StopperBubbler® 5 or 6 gallon
Small Universal Stopper - Drilled or SolidGlass 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 SolidBubbler® 5 or 6 gallon
Additional Information
Support Documents:No
5.0 / 5.0
2 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Stars
Good solid stopper.
Good solid stopper.
June 21, 2016
Good choice
Very great tool for those of you that use better bottles. It sits down in the carboy neck so make sure it is totally sanitized. It creates an air tight seal when its still wet with sanitizer. It also accepts your standard airlocks, and they sit a bit down in the neck. Still viable to see bubble activity but I find that this is the most secure holding device for airlocks. This works better than the stopper types in my opinion, less likely to be bumped or knocked aside.
January 28, 2013
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is this the stopper to be used on the 6 gal plastic bubbler with the blue top? Also do you have the #8 corks in smaller quantities?
V R on Aug 4, 2016
BEST ANSWER: You will need a small universal stopper for big mouth bubblers


The smallest quantity of #8 corks that we sell is 30.

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