Airlock For Fermentation - S-Shaped

Airlock For Fermentation - S-Shaped

In Stock
60 day no hassle return policy. Details

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 - In Stock
Pennsylvania - In Stock
Weight 0.06 LBS
Community Q&A

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Why did you choose this?
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looks cooler than 3 piece? idk man...
Erich R on May 29, 2020
For cider!
Angelica M on May 16, 2020
looks cooler than 3 piece? idk man...
Erich R on May 29, 2020
Michael B on May 22, 2020
For cider!
Angelica M on May 16, 2020
Because I need it?
Frank G on May 5, 2020
Just decided to pick up another, you can't have too many of these.
Tina G on May 2, 2020
No moving parts to clean or lose
KEVIN T on May 2, 2020
prefer it over 3 pc because of durability simplicity
Robert B on May 1, 2020
I've used s shaped before and like them.
Anthony H C on Apr 28, 2020
want to have two batches going at once
Christopher H on Apr 22, 2020
Because I need it
Justin m on Apr 20, 2020
Worked for me in the past
Graupmann, J on Apr 13, 2020
Good price
chris c on Apr 10, 2020
Need a new airlock for my carboys.
Patrick W on Apr 9, 2020
because your website recommended it
Charles Dowd on Apr 8, 2020
Filler for free Shipping
Jim M on Apr 7, 2020
I think it is easier to see the bubbles. With the upright ones the inner cap is never straight, hard to see the fluid level in the airlock.
John B on Apr 7, 2020
Recommended by a friend for mead brewing
Oren J on Apr 6, 2020
just in case
john r k on Apr 6, 2020
I like the S shape better
Erin E on Mar 21, 2020
Having extra on hand incase one breaks or cant be cleaned properly.
Timothy E on Jan 23, 2020
Keep out bugs
Devin B on Jan 14, 2020
Seems I never have enough for what i'm doing.
Wrobbel, S on Jan 3, 2020
For carboys
roland l on Dec 31, 2019
Replace broken three piece airlock
Bryan R on Nov 30, 2019
used it
brian e on Nov 20, 2019
It was recommended by a friend
German O on Nov 12, 2019
have used for years need more
Ed M on Nov 2, 2019
Need it for the new carboy
Peter B on Oct 30, 2019
Need it, love it
Kole s on Oct 14, 2019
I like these airlocks better than 3-piece ones
Michael M on Oct 8, 2019
Online video
jeremy g on Oct 7, 2019
I like this one
Carl C on Oct 2, 2019
Making a ton of wine
Michael L on Sep 24, 2019
For wine fermentation
Mary O on Sep 21, 2019
Charles S on Sep 20, 2019
Can always use extras.
Aaron L on Sep 20, 2019
need it quickly
Peggy A on Aug 28, 2019
Thought I would see the difference between the 2 different airlocks
Jenny S on Aug 28, 2019
always good to have a few extra
Brian B on Jun 20, 2019
For cold crashing.
Shawn F on May 23, 2019
Running low on airlocks--giving this one a try over the 3 pc airlock
Mike Sullivan on May 13, 2019
Other fermenter has a 3 piece so mixing it ul
Michael J on Apr 12, 2019
Easy to use, no extra pieces.
Dean K on Apr 12, 2019
easier to monitor activity than 2-piece airlocks
Christopher Taylor on Mar 7, 2019
Sometimes you have to take the bus
Martin G on Mar 4, 2019
they always seem to be missing when you need them
Valued C on Jan 23, 2019
You can never have too many of these
Robert W on Jan 3, 2019
Seth M R on Dec 27, 2018
New to brewing, but less moving pieces helps my ease of mind as I am collecting more and more brewing equipment
Matthew l on Nov 21, 2018
Two pieces is fewer than three
Brian E on Nov 17, 2018
Michael B on May 22, 2020
Because I need it?
Frank G on May 5, 2020

3.9 / 5.0
33 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
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 month ago
Works great,fits the job I needed for.
October 24, 2019
8 months ago
Works great for the home brewer
July 8, 2019
11 months ago
Good product.
Purchased a few of these over time so I can have different batches in fermenters at the same time. Prefer these over the three piece airlocks.
January 18, 2019
1 year ago
Very practical air lock
Even though these air locks may seem flimsy compared to the three piece air locks, they work much better for me.
Not having to keep track of three pieces.
Even a teaspoon of liquid will still maintain an air lock
January 9, 2019
1 year ago
Not my favorite
Plugged up pretty easily. Ended up blowing off the jug and across the kitchen!
April 3, 2018
over 2 years ago
Seams need to be shaved.
There are sharp seams on the tube that goes into the stopper. However, there are easily scraped off with the side of a sharp knife then sanded with a little bit of polishing sandpaper. Price is reasonable
April 2, 2018
over 2 years ago
S shaped airlocks
These airlocks do exactly what they were designed to do. They work. They could be improved by the addition of a flange ( about the diameter of a penny ) at the first bend above where the stopper slides on.
February 12, 2018
over 2 years ago
It works at least once
It isn't too expensive, but will probably only work once well.
When everything starts pushing it's way up there, a few things get stuck to the sides in the "bulb" area. Starsan won't get that out either, and try getting a small brush to run through it without scratching the sides? Impossible.
January 22, 2018
over 2 years ago
Love these airlocks
This is my go-to airlock.
CLEANING: I'm a beer-hygiene freak and these are EASY to clean even when heavily fouled after a vigorous primary: Strong, warm PBW solution, a quick soak and a shake or two ==> clean as the day you bought them. Finish them off with a StarSan soak and Bob's your uncle.

LIQUID BACKWASH: If you're sucking liquid into your carboy while cooling then you're adding too much liquid. I generally use StarSan as the liquid except where high CO2 production rates cause too much foaming. Like Mike E. suggests above, use vodka and any problems are over.

CO2 MONITORING: This is the real beauty of these air-locks. You can easily detect even the most minute CO2 production. This is not essential but I love watching my beer ferment.
November 16, 2016