FerMonster Carboy - Replacement Lid O-Ring

FerMonster Carboy - Replacement Lid O-Ring

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Replacement O-ring for the Fermonster Plastic Carboy lids (all sizes use same lid).  

The o-ring is a little tricky to install so please be sure to watch our video in the video tab on how to install it. 


Item # FE251
Shipping Eligible for Free Shipping Program
Availability California - In Stock
Pennsylvania - In Stock
Weight 0.12LBS
Community Q&A

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Browse 2 questions Browse 2 questions and 41 answers
Why did you choose this?
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Need for solid lid
Clarence S on Oct 10, 2019
Dave W on Sep 17, 2019
Need for solid lid
Clarence S on Oct 10, 2019
Need them
Todd S on Oct 8, 2019
Dave W on Sep 17, 2019
Just in case
Valued C on Aug 28, 2019
Spares are important
Ethan C on Jul 19, 2019
Just as a spare.
Sammy K on May 25, 2019
As a back-up
Joshua O on Apr 23, 2019
Spare seals
Frederick B D on Apr 20, 2019
Future need
Catherine M on Apr 18, 2019
Always have spares
Paul R on Apr 16, 2019
Steve S on Feb 6, 2019
Just in case
Jose J. R on Jan 28, 2019
Michael H on Jan 19, 2019
My other ring got damaged
steve g on Jan 14, 2019
Gotta have a gasket.
MICHAEL W on Jan 3, 2019
For a backup
Valued C on Jan 3, 2019
Nice to have a spare
Andrew Ryan on Dec 21, 2018
replacement part
Benjamin E on Dec 18, 2018
Extras as hard to remove from lid . Want extra in case it breaks
William O on Nov 28, 2018
It's always good to have a replacement on hand
Allan M on Nov 19, 2018
Gene E on Nov 17, 2018
GARY N on Oct 9, 2018
charlie r on Sep 29, 2018
Stretched out my first O-Ring trying to get it to fit in the lid.
Douglas Frazer on Sep 22, 2018
o-rings get stretched out. best to be prepared
Rene' M on Sep 6, 2018
they are not real sturdy!
Michael V on Sep 1, 2018
Replacing old o ring
Andrew C on Aug 18, 2018
In case I need them as replacements.
Rich on Aug 8, 2018
mine stretched out
Ollie S on Aug 7, 2018
Spare parts
Justin D. K on Jul 19, 2018
these don't fit well and need to be replaced somewhat often
Bradley M on Apr 25, 2018
Got this just in case I need it later.
David P on Apr 19, 2018
Back up parts
Tim E on Apr 19, 2018
i am a clutz
Dave L on Apr 12, 2018
good to have
James S on Apr 6, 2018
Heard it was good to have an extra.
James C on Feb 24, 2018
Lost the one that came with mine.
Heather B on Feb 5, 2018
my oring was defective
Michael G on Jan 31, 2018
Need them
Todd S on Oct 8, 2019
Just in case
Valued C on Aug 28, 2019
Are these necessary it seems airtight without it?
Matt Mcdonald on Apr 30, 2018
BEST ANSWER: These are replacement/backup O-rings. The Fermonster ships with one.

4.7 / 5.0
3 Reviews
5 Stars
4 Stars
3 Stars
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1 Star
I bought this for a spare at my age it is easy to lose or misplace things I use.
February 12, 2019
8 months ago
Ordered a couple to have on hand as these are small and thin and I'm sure will need to be replaced. The size if then though is odd as they are larger then ones I was finding locally so added them to order I was making to have extra of. Used originals now for a year and no issues.
September 10, 2018
1 year ago
It takes a little mucking about to get the o ring in place but they do seal well.
June 26, 2018
1 year ago