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Old 02-06-2009, 08:30 PM   #1
jcole
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Default To cover or not to cover?

I remember reading somewhere that you should never cover the pot when boiling wort.

Is this true? Does anyone know why this is?

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Old 02-06-2009, 08:34 PM   #2
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DO NOT COVER. Take a gander at this: Dimethyl sulfides - Home Brewing Wiki

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Old 02-06-2009, 08:35 PM   #3
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I believe you are supposed to leave it uncovered so that the DMS (or something like that) will boil off and not cause any off flavors. I don't think it is as big of a deal when you are using extract, but it is still a good idea to leave the lid off.

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Old 02-06-2009, 08:37 PM   #4
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You can cover while the wort is coming to a boil. Some cover partially while boiling.

Covering while boiling causes compunds that form DMS, Di-Methyl Sulfide togo back into the wort thus causing off-flavors.

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Old 02-06-2009, 08:49 PM   #5
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Interesting.. Thanks guys.

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