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The Twin Bubble Airlock and Carboy Bung pack includes two airtight, food-grade plastic airlocks and universal-fit rubber bungs designed for seamless fermentation of beer, wine, mead, kombucha, and fermented foods. Its twin bubble design allows automatic CO2 release while preventing oxygen entry, ensuring optimal fermentation conditions with easy visual monitoring. Durable, easy to use, and trusted by homebrewers, this set is a must-have for anyone serious about crafting quality brews and ferments.






| ASIN | B00A6TRKO4 |
| Best Sellers Rank | #13,962 in Kitchen & Dining ( See Top 100 in Kitchen & Dining ) #4 in Brewing & Fermentation Airlocks |
| Brand | FastRack |
| Color | Clear/Tan |
| Date First Available | November 13, 2012 |
| Global Trade Identification Number | 00825392000052 |
| Is Customizable | No |
| Is Discontinued By Manufacturer | No |
| Item Weight | 0.96 ounces |
| Item model number | B00A6TRKO4 |
| Manufacturer | Fermtech |
| Material | Plastic, Rubber |
| Number of Items | 2 |
| Product Dimensions | 3.15"L x 1.97"W |
| UPC | 628504292792 825392000052 |
D**A
Effective and works as advertised.
Bought these a few years ago and still using them every year to make wine. If you haven't tried it, plant some vines and go for it. It's very satisfying.
M**N
Good price very functional
Worked aa expected
T**Y
Quality bubblers!
Great for homemade wine making. I used these without the stopper on my primary fermenter and with the stopper on my secondary glass carboy. They are well made and work very well. I did notice the stoppers liked to slip up out of the neck of the glass carboy a little so I had to tie them down into the neck but this may be unrelated to the stopper itself.
B**K
Good
Works good need to order
D**S
they were very good
very good
Y**O
Es igual que en la foto
C**S
Airlock works good
I have 2 gallon carboy used to make small mead batches, but the plastic airlocks cracked, I went ahead and ordered this ones and cant be happier, they work good my only complaint is that if I fill my carboy too high the foaming from fermentation will get in the airlock making it difficult to clean up. These are a little taller than the old ones but they are good value
M**L
Budget
It's okay, best budget version I've found. If you don't want the bung to constantly slide you have to rough the sides up with some fine sand paper. Fits isn't great for my Italian carboys and constantly slides.
M**M
It only just arrived, so I only gave gotten to test the fit so far, but it's absolutely perfect. I'm brewing cider in a 23L glass fermenter. The bung I got from the homebrew shop just did not fit at all and I had to tape it down for the previous brew. This one fits perfectly, very securely, and the air lock fits just as securely. I was looking at caps and was astounded at their price in Australia. This fella will surely provide a better seal, though. And the hollow design means that it should fit a slight range of diameters with its ability to flex. Simple is best!
A**T
Quality is good
D**E
good product, safely packaged, arrived in good shape
R**T
Cumplen su funcion muy bien, el sello está un poco más rígido de lo esperado pero funciona perfecto
P**O
Buen producto
Trustpilot
3 days ago
1 week ago