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What does a white substance on the pipe connecting to my heating system and/or rotting flue pipe mean?

April 26, 2017flue heating mean pipe rotting substance system white

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What does a white substance on the pipe connecting to my heating system and/or rotting flue pipe mean?

1 Answer

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This white substance means that the flue gases are not drafting up the chimney, they are condensing in the pipe causing moisture. This could be from a plugged chimney or could also be caused by a cold chimney.