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No. 6.5 Stopper - Drilled



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Drilled gum rubber stopper. Used to provide a positive seal on fermentors.

Top Diameter: 1.339"

Bottom Diameter: 1.063"


Availability: In stock

Pic of SD6.5

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  • No. 6.5 Stopper - Drilled
  • Pic of SD6.5
Product Details

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"

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
2.8 / 5.0
8 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Stars
Not impressed
Easily gets pushed into the carboy and is a pain to get out.
November 22, 2017
6 months ago
Ported (drilled) Big Mouth Brewer… no.
The holes for the spigot are drilled with a step-drill and are not clean, round holes. They are rough, ragged, and will not be easy to sanitize. You can do better buying a standard Big Mouth Bubbler and drilling your own hole with a fine-tooth hole saw! I complained about my first one, assuming it was a mistake. The replacement was not noticeably improved, even though the tech I spoke with promised to send me “one of the better ones”. Too bad- the idea is a good one. Northern Brewer’s execution is just sub-par.
October 14, 2016
Response from Northern Brewer

I'm sorry to hear about the trouble with the bubblers. Are they working out for you? Please let us know if there is anything that we can do to help.
November 21, 2016
Northern Brewer
# 6.5 Stopper
This is the absolute best stopper I have ever had.
March 27, 2016
Do not get this! It does not fit right. Mine fell into my glass carboy and now I can't get it out...
January 5, 2016
Response from Northern Brewer
Hi Matt,

I'm sorry your stopper fell through. If you can email Mike S. at info@northernbrewer.com with your order number, we'd be happy to send out a different stopper that should fit.
November 21, 2016
Northern Brewer
Sticks Like Glue
I have no idea what the other reviewers are talking about as THESE rubber based stoppers are all I'll use. I think they are talking about the other plasticish stoppers offered with the carboys, they suck and won't hold until dried. These stick like they were glued in place............. which does cause a bit of an issue getting them out. BUT, I'd rather have an ultra great seal and have to dig it out instead of worrying about my stopper popping out.
April 9, 2013
Great for the price
I use these stoppers on all of my equipment and they never slip out and i have never had a sealing problem.
March 23, 2013
Both style airlocks slide in and out of hole through bung.
Neither of the two airlocks (both different types) I have purchased will give a seal and keep air contaminants out. Not sire what to do, but I will be looking for a different stopper/airlock combo.
November 1, 2012
Not good
My airlock slips outNeed to get a better fitting stopperThird batch!I use Saran wrap to help secure it
June 17, 2012
Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 2 questions Browse 2 questions and 2 answers
will the hole in this fit a racking cane?
A shopper on Dec 18, 2017
BEST ANSWER: Hi there,
That hole is not big enough for a racking cane. Cheers!
I need a stopper for my 5 Gal. carboy item 7081, what is your SKU# for that
S H on Oct 29, 2015
BEST ANSWER: I recommend the small universal stopper. A size 6.5 works as well. 7081 is the small sd6.5 is the stopper

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