Airlock For Fermentation - S-Shaped

Airlock For Fermentation - S-Shaped

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S-shaped airlocks are the "OG" airlocks for home beer and winemaking. They make it easy to spot fermentation activity, and have no loose peices to lose.

The advantage of this type of airlock is that they have a smaller chamber so you can more closely observe the CO2 rising and therefore the rate of fermentation. They are also handy when you are cooling a beer as there is less chance of sucking airlock water back into the fermentation. They cannot be cleaned manually if they get dirty during the ferment. That is why many homebrewers prefer 3-piece airlocks for the active portion of the ferment, when the krausen (foam) from fermentation might be pushed up into the airlock.

Please Note: Stopper Not Included. 

Item # FE371
Shipping Eligible for Free Shipping Program
Availability California - Out Of Stock
Pennsylvania - In Stock
Weight 0.06 LBS
Community Q&A

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Why did you choose this?
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To provide an exit for carbon dioxide from my fermenters that won't allow oxygen to enter the fermenter
Joel G on Oct 19, 2021
ordered from you before
Steve L on Oct 12, 2021
To provide an exit for carbon dioxide from my fermenters that won't allow oxygen to enter the fermenter
Joel G on Oct 19, 2021
Charles H on Oct 13, 2021
ordered from you before
Steve L on Oct 12, 2021
Works for me
Kenneth H on Oct 11, 2021
I need it
Peter B on Oct 8, 2021
Need replacements
Kenneth H on Aug 31, 2021
Used in the past and works great
Brent J on Aug 24, 2021
simple airlock solution. bubble! bubble!
Andrew L on Aug 18, 2021
To go with my new FerMonster
Daniel T on Aug 3, 2021
good secondary air lock
nathan p on Jul 28, 2021
Makes it easy to tell if your mash is still working or not,
Richard C on Jul 20, 2021
I need it.
Craig C on Jul 6, 2021
Always can use airlocks
John H on Jun 30, 2021
I always pick up a new airlock when getting a new fermenter
Heather J on Jun 10, 2021
best experience
Klaus K on Jun 4, 2021
Handy airlocks
BENJAMIN S on May 5, 2021
To make mead.
David Antonio Curiel C on Apr 23, 2021
It works
Shawn M on Apr 23, 2021
Upgrade from the other style of airlock
Byron D on Apr 22, 2021
to match ones I already had
Ronald J on Apr 3, 2021
Great standard airlock for all my brewing
Valued C on Mar 31, 2021
To make mead
Andrew Butler on Mar 24, 2021
Solid airlock
Melanie F on Mar 3, 2021
just learning
Rose S on Feb 11, 2021
Never had one before
Augustine S on Feb 11, 2021
Can never have enough
Rich on Feb 9, 2021
Great airlock.
Michael C on Feb 8, 2021
reliability, good value
Barry R on Jan 29, 2021
suggested as best airlock
Brian G on Jan 18, 2021
add to inventory
Barry Y on Jan 16, 2021
Backup airlock
Warren O. on Jan 7, 2021
stay cleaner
john l on Dec 30, 2020
Wine making
Timothy F K on Dec 29, 2020
Need beer
Melanie F on Dec 27, 2020
saw this used on youtube
Gregory S on Dec 16, 2020
i like this kind
john l on Dec 15, 2020
need for fermentation
Lora T on Dec 10, 2020
Misael M on Dec 8, 2020
To go with the 3gal carboy and extra
Bryan K on Dec 1, 2020
Steven G on Nov 25, 2020
Anthony P on Nov 22, 2020
Because I need it.
Albert Bryan B on Nov 19, 2020
saw it on a video
deanne o on Oct 28, 2020
Spare part
Daniel T on Oct 22, 2020
using for a pickling bucket
Marc H on Oct 20, 2020
These work great
James R S on Oct 14, 2020
mead brewing
Melissa F on Oct 11, 2020
try new type
Eric R on Oct 6, 2020
Good for Secondary Racks
Bryan & Jenna K on Sep 22, 2020
I want it.
Michael S on Sep 19, 2020
Charles H on Oct 13, 2021
Works for me
Kenneth H on Oct 11, 2021

4.0 / 5.0
40 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Rated 5 out of 5
K.I.S.S. Principle
These "S" air traps are definitely following the tried and true KISS principle. First and foremost, they are simple, no multiple parts to get lost. They are fairy easy to clean, pop the plastic dust debris cap off, blast soapy water, then sanitizer, then rinse water. tilt back and forth till drained, Then replace the cap, fill to marks with water, twist into carboy stopper hole and you're done. Hint: Wet stem to aid in insertion. I've yet to have must foam so high as to blow out through this trap, so I can't comment on how the trap works in that situation. That aside, these fit the bill for me.
August 20, 2021
1 year ago
Rated 5 out of 5
Airlock - S - Shaped
No problem. Works fie
March 4, 2021
8 months ago
Rated 5 out of 5
Best airlock
I prefer these to the 3 piece one.
January 1, 2021
10 months ago
Rated 5 out of 5
Easier to see bubbles than the 3-piece
So far, I like this airlock much better than the 3-piece one I had. It's probably harder to clean, but not sure that's an issue yet.
October 5, 2020
1 year ago
Rated 5 out of 5
Nice bubbler
Always like to keep these looking like new. These fit neatly to the carboy plugs and work well.
September 21, 2020
1 year ago
Rated 4 out of 5
S-shaped Airlock
These are good. The only thing I'd complain about is that they are not very strong and can break if you twist them whilst trying to get them out of the stopper.
September 15, 2020
over 3 years ago
Rated 3 out of 5
Works perfectly, a bit brittle
Not a lot of options out there. These things work perfectly until they break. I’ve had a few snap with very little force, attempting to twist pull them out of a bung.

I’ll continue to buy these, but I wish there was a more solid solution
June 5, 2020
over 2 years ago
Rated 5 out of 5
I only use S shaped airlocks
I put just enough water in to fill the bottom U in the airlock. That minimizes back pressure while still maintaining an air lock.
April 28, 2020
1 year ago
Rated 5 out of 5
Works great,fits the job I needed for.
October 24, 2019
over 2 years ago
Rated 5 out of 5
Works great for the home brewer
July 8, 2019
over 2 years ago