I never get tired of watching the fermentation action with these airlocks. It's very satisfying watching and listening to them burble away.

MAKE FOR NICE TIGHT SEAL.

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.

No problem. Works fie

I prefer these to the 3 piece one.

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.

Always like to keep these looking like new. These fit neatly to the carboy plugs and work well.

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.

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

I put just enough water in to fill the bottom U in the airlock. That minimizes back pressure while still maintaining an air lock.

Works great fits the job I needed for.

Works great for the home brewer

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.

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

Plugged up pretty easily. Ended up blowing off the jug and across the kitchen!

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

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.

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.

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.

Difficult to clean but dump some vodka in there and forget it.

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.

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.

I like these airlocks for anything I'm aging long term. Easy to keep filled.

good

It does the job I haven't used it for a vigorous fermentation. I would probably use my 3 piece for that. But for lower gravity brews this works fine.

these airlocks allow you to easily monitor gas off and keeps the air out. Decently priced as well

Yes the 3-piece is easier to clean... I typically use a 3-piece at the beginning of fermentation when I might experience some "blow off" with a vigorous ferment. As things settle down I switch to the S-shaped airlock because it's easier for me to gauge/see how much CO2 is still coming off the beer.

I prefer the three piece ones because they are easier to clean (especially if you neglect to use a blow-off tube when you should have).

Every yeast ferments differently. If super active I use a blow-off tube switch to a 3 piece after it stops spewing yeast and then switch to this S-type airlock during secondary fermentation. It works especially well on Lambics to see what if anything is going on.

Works good ad you can keep an eye on fermintation

This works for a slow ferment. But when you have a strong ferment this can blow off. Also it is hard to clean. I would prefer the 3 piece airlock.

With a little sanitizer in the water a good product. Works as advertised and easier to judge activity/water level than the 3 piece airlocks.

When carrying it will allow the air to flow when a better bottle flexes while the 3 piece will end up with liquid sucked into your better bottle. First put in the bung then insert the air lock.