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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Browse 4 questions Browse 4 questions and 13 answers
Why did you choose this?
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Easier racking
JAMES M Y on Feb 17, 2023
for use with my ink bird
jason on Jan 24, 2023
Easier racking
JAMES M Y on Feb 17, 2023
Closed transfer
Clifton Lawson on Jan 28, 2023
for use with my ink bird
jason on Jan 24, 2023
Can't find anywhere else
Daniel W on Nov 29, 2022
To use the thermowell we purchased.
Charles H on Nov 16, 2022
For thermowell and closed transfers from my Chapman stainless fermenter
Brian W on Oct 23, 2022
To be able to use a thermowell with my Fermonster
William W on Aug 2, 2022
had 2 3 gallon fermonster
Rob L on Aug 1, 2022
for lager fermenting
John K. on Oct 8, 2021
added temperature probe to my fermenter
Russel W H on Oct 8, 2021
Closed transfer potential
James H on Aug 24, 2021
To go with fermonster lid
Dirk L Pletcher on Jun 5, 2021
FRANK M on Apr 22, 2021
For use with a Thermowell on a FerMonster 3 gallon fermenter.
Jeff on Apr 8, 2021
Proper size for better bottle
Collin H on Mar 23, 2021
To be able to add a thermowell to a 6 gal. better bottle carboy
Daniel W on Mar 2, 2021
To find a stopper that hopefully stays in place.
Rick A on Jan 27, 2021
for thermowell + airlock in a plastic carboy
Doug V on Dec 24, 2020
For temp control for my fermonster fermenter.
Chris C on Sep 25, 2020
Best stopper for the Fermonster you can get!
Colby Bullock on Sep 17, 2020
making a system to push beer from fermenter to keg (hopefully nooxidstion during the transfer.
Bob P on May 21, 2020
Use temp probe during fermentation
Kevin Sinarle on May 18, 2020
To go with the Fermonster
Michael J on May 9, 2020
Seems like the best fitting stopper for the 7 gal. FerMonster Carboy that still allows for a blowoff tube.
Colten Zachary on May 6, 2020
Need to use with thermowell in plastic carboy
Steve N on May 5, 2020
Robert B on May 1, 2020
Need to use for temp probe
Brian Higgins on Apr 9, 2020
Forgot to get it with the fermonster
Jake K on Apr 8, 2020
Works perfectly with the 15" thermowell!
Michael Postiff on Mar 31, 2020
Add thermowell to get more accurate temp readings!
Greg M on Mar 3, 2020
I just wanted it.
Gordon G on Feb 19, 2020
My goal is to use this as a closed transfer port. We will see if it works.
Michael Postiff on Feb 13, 2020
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 on Mar 15, 2019
To measure temp during fermentation
Donald A on Jan 28, 2019
Set up closed pressure transfer from carboy to keg
hnnrrk on Jan 13, 2019
Required and temp probe opening
Deane 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
Closed transfer
Clifton Lawson on Jan 28, 2023
Can't find anywhere else
Daniel W on Nov 29, 2022
Will this work with the fermonster?
Jeremy Payne on Feb 10, 2019
BEST ANSWER: Yes! It works great with a fermonster with the hole in the lid. I use it for for CO2 transfers. The ribs on this stopper make it the bees knees for this operation. Buy it. Now.
Will the 1/4” hole work with 1/4” ID vinyl tubing? I want to use two blowoffs, one being 1/4” and the other 3/8” vinyl tubing.
Colten Zachary on May 3, 2020
BEST ANSWER: The 1/4" hole can accommodate tubing with an outer diameter of up to 5/16" and that will be a very snug fit.
what are the top and bottom diameters?
Ceasar Pimentel on Jul 1, 2022
BEST ANSWER: top: 2 inches
bottom: 1 5/8 inches
depth: 1 inch
Softer than the white rubber ones. Easier to seal and remove.
Can I insert a 1/4" carbonation cap and 3/8" racking cane into this? I want to transfer my beer from my 7 gallon plastic fermonster to keg with little oxidation. I haven't seen anyone do it with stoppers before.
JamesC814366206 on Mar 25, 2020
BEST ANSWER: Those pieces would fit through this stopper and you will be able to do what you're thinking of. Please be careful when pressurizing plastic containers and be careful not to put so much pressure that is expands or bursts.

4.6 / 5.0
13 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Rated 5 out of 5
Five Stars
Works well with the Thermowell.
December 20, 2022
1 year ago
Rated 5 out of 5
Great bung
Perfect bung for our 5 gallon carboys to use with our temp probe and airlock. Fast and free shipping (depending on cost of purchase). Would purchase again.
December 7, 2022
1 year ago
Rated 5 out of 5
2 hole bong
Great for thermo well and air lock combo.
October 21, 2022
1 year ago
Rated 5 out of 5
fits great
fits into my PET carboy snuggly with a thermowell and airlock.
September 13, 2022
1 year ago
Rated 5 out of 5
Stopper for PET carboys with thermowelll temp probe.
Good for airlock + thermowell use since the universals don’t have two hole stoppers, this is the ticket with a PET Carboy with a temperature controlled fermentation setup.
January 14, 2021
over 3 years ago
Rated 5 out of 5
Perfect Fit
Perfect fit for fermonster lid. Great 2-hole stopper for this fermenter
January 22, 2020
over 4 years ago
Rated 5 out of 5
Great product. I used it when I did the cold crash
December 16, 2019
over 4 years ago
Rated 5 out of 5
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
over 5 years ago
Rated 3 out of 5
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
over 5 years ago
Rated 5 out of 5
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
over 5 years ago