Airlock - S-Shaped
FE371
An old traditional style of airlock that is still preferred by wine makers during an ML fermentation and for longer term aging. A 3 piece style airlock (FE370) is preferred for active primary fermentation of sugar because they can be easily cleaned when they get dirty. The S-Shaped is better for long term aging because the water in the airlock has less surface area and will not evaporate as quickly. They are preferred for ML fermentation because they will show positive pressure, an indication that your ML fermentation (which are very slow and hard to detect) is working.
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