Home Brew Forums > Home Brewing Beer > Fermentation & Yeast > Can you have airlock activity without fermentation?
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Old 09-08-2009, 08:05 PM   #1
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Default Can you have airlock activity without fermentation?

Just curious. I always see just because you have no activity it doesn't mean there is no fermentation. Does it work inversely?

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Old 09-08-2009, 08:11 PM   #2
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If your wort is colder than the ambient temperature in the room, as it warms up, you might see some airlock activity that isn't a result of fermentation.
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Old 09-08-2009, 08:31 PM   #3
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Changes in temperature (of the beer or ambient air) or atmospheric pressure can lead to airlock activity - and not only out, you could get suck-back.
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