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Fermentation Airlock - S-Shaped
FE371
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Description

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 0.06LBS
Community Q&A

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Browse 1 question Browse 1 question and 9 answers
Why did you choose this?
MoreFlavor Store
works
John O on Aug 10, 2018
Need some new ones.
Thomas T on Jun 13, 2018
works
John O on Aug 10, 2018
It's the only one they had in this style.
Chris J on Aug 8, 2018
Need some new ones.
Thomas T on Jun 13, 2018
can always use these and it took me to free shipping
Patrick M on Jun 8, 2018
For buckets on order
Brian R on Jun 6, 2018
Need one
Merritt G on May 1, 2018
Simple looking airlock
Christoper S on Mar 29, 2018
keep o2 out
JESSE R on Mar 16, 2018
For long-term storage of wild yeast cultures
Kyle K on Jan 30, 2018
It's the only one they had in this style.
Chris J on Aug 8, 2018
can always use these and it took me to free shipping
Patrick M on Jun 8, 2018
Reviews

3.7 / 5.0
28 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
10
7
7
1
3
Not my favorite
Plugged up pretty easily. Ended up blowing off the jug and across the kitchen!
April 3, 2018
Purchased
5 months 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
Purchased
7 months 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
Purchased
6 months 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
Purchased
7 months 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
Great for secondary, don't use for primary ferment
Difficult to clean, but dump some vodka in there and forget it.
May 31, 2015
Can't Clean
Very difficult to clean. Go with the three piece - same price, infinitely better.
May 29, 2015
Response from MoreFlavor
Easy to clean...strong PBW does nicely
December 14, 2017
Duff H.
Response from MoreFlavor
Absolutely CAN clean...Strong PBW does wonders, even after heavy krausen flow-through.
December 14, 2017
Duff H.
Response from MoreFlavor
Easy to clean...strong PBW does nicely
December 22, 2017
Duff H.
Response from MoreFlavor
Absolutely CAN clean...Strong PBW does wonders, even after heavy krausen flow-through.
December 22, 2017
Duff H.
Good especially for lagers and/or cold crashing
The sanitizer I put in these stoppers does not get sucked into the carboy during temperature drops like the 3 piece airlocks do. For that reason I'll throw these on before dropping to lagering temps or cold crashing an ale. They are a bit difficult to clean if your krausen gets too high and blows through it. If soaking it doesn't work I just throw it out since they are cheap anyway. Just buy more than you need to start.
May 28, 2015
Works. Not as Good With Plastic Fermentors.
I use these airlocks with glass fermentors, but not with plastic Better Bottles. If you have to move a full plastic fermentor there is a possibility that some suction will occur. Sanitizer, vodka, or whatever liquid you fill your airlock with is more likely to be sucked out of these S-shaped airlocks than the 3-piece ones.
May 21, 2015
Good Value
I like these airlocks for anything I'm aging long term. Easy to keep filled.
May 11, 2015