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Two Hole #10 Brewmaster Silicone Stopper

Two Hole #10 Brewmaster Silicone Stopper

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This stopper has two holes and we use it in the production of our #10 stopper thermowell. It features one 3/8" hole and one 1/4" hole. A racking tube or stainless tube can be inserted into the 1/4" hole with the aid of some lubrifilm, forming an airtight seal, and the 3/8" hole fits an airlock. Even after you wedge all these fittings into it, it still fits a plastic carboy neck! Use this in any configuration you can think of, it'll fit: Airlocks, Thermowells, Racking Canes, and anything else you can imagine!

Item # FE486
Shipping Eligible for Free Shipping Program
Availability California - In Stock
Pennsylvania - In Stock
Weight 0.20 LBS
Community Q&A

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Celeste H on Dec 16, 2019
To be used in a Louis Pasteur function.
Tom S on Dec 4, 2019
Celeste H on Dec 16, 2019
Use to siphon my wine to jugs
Gregory P C on Dec 12, 2019
To be used in a Louis Pasteur function.
Tom S on Dec 4, 2019
Temperature Control Carboy
Dennis S on Nov 25, 2019
picked to fit fermonster lid opening
Gabriel S on May 21, 2019
Closed transfer loop from plastic carboy with 3.8" racking cane
Matt Hunsworth on May 14, 2019
Closed/low O2 transfer to kegs
Alan S on May 3, 2019
Provides options
Catherine M on Apr 18, 2019
Closed keg transfer from a 7gal fermonster.
Alan S on Apr 4, 2019
Need for air lock and thermowell in PET Fermenter
John S on Mar 15, 2019
To measure temp during fermentation
Donald A on Jan 28, 2019
Set up closed pressure transfer from carboy to keg
Henrik Rypkema on Jan 13, 2019
Required and temp probe opening
Dwane C on Nov 21, 2018
So I can do a blowoff tube and a thermowell
Seth L on Sep 24, 2018
I’m going to start using 5 gal. water jugs to ferment in.
Jason T on Sep 20, 2018
good design
Michael M on Apr 7, 2018
So I can do a closed transfer
Matthew L on Feb 22, 2018
Gotta plug up that fermonster somehow!
Kenneth B on Jan 15, 2018
Use to siphon my wine to jugs
Gregory P C on Dec 12, 2019
Temperature Control Carboy
Dennis S on Nov 25, 2019
Will this work with the fermonster?
Jeremy Payne on Feb 10, 2019
BEST ANSWER: Yes. I am using it with my 7 Gallon Fermonster. Works so much better than traditional stopper which tends to slip when wet. This one is ribbed and locks itself in place ensuring an airtight fit.

4.4 / 5.0
8 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Perfect Fit
Perfect fit for fermonster lid. Great 2-hole stopper for this fermenter
January 22, 2020
3 weeks ago
Great product. I used it when I did the cold crash
December 16, 2019
1 month ago
Works Well
These work great. The ridges help keep the stopper in place, and the holes are the perfect size for a thermowell and airlock.
February 4, 2019
1 year ago
Too small for smooth-neck carboys
It works, barely, but I've nearly pushed it all the way into the carboy several times now and had to lever it out with a racking cane. If it was just a little larger or had a mushroom top it'd be great. As it is, I will be sticking with the standard rubber stoppers.
July 30, 2018
1 year ago
Great item!
I couldn't find anything to cap my new Best Bottle until I looked at your website. Great idea . Silicone composition allow thorough cleaning and it should last a long, long time.
June 25, 2018
1 year ago
Nice quality, needs some attention to detail to be fully functional
Nice quality stopper. Only problem I have with it is the larger hole is drilled a little too large to seal properly when using a racking cane. If the hole was slightly smaller it would be ideal
User submitted image
Added Apr 27, 2018
April 27, 2018
1 year ago
Dual Hole Silicon Stopper
Great addition to my fermenter adding a thermowell.
April 24, 2018
1 year ago
Great but...
I wish it was just slightly bigger. To get a tight seal, you have to basically push this down into the neck of the carboy which makes it somewhat tough to remove. Otherwise this is exactly what I was hoping for.
January 24, 2018
over 2 years ago