vent question

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1

Originally Posted By: berby
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http://www.nachi.org/bbsystem/usrimages/N/NAYLOR_024.jpg ]

2

Originally Posted By: lkage
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It appears it could be from condensation rusting the pipe.

–
“I have never met a man so ignorant that I couldn’t learn something from him.”


Galileo Galilei

3

Originally Posted By: berby
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Thanks Kage

4

Originally Posted By: jkormos
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CO also causes that over time it reacts with the metal.

5

Originally Posted By: lkage
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Joseph is right.


One of the byproducts of burning fossil fuels is water vapor. The water vapor can condense on the chimney. A wet chimney can rust out the metal flue pipes. And there are also some acids like nitrogen dioxide and carbon monoxide involved that can hurry this rusting along.

--
"I have never met a man so ignorant that I couldn't learn something from him."
Galileo Galilei

6

Originally Posted By: berby
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Thanks guys. You guys are better than Dell help center. One day I will be a vet.

7

Originally Posted By: jrivera
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just curious, how long is the pipe ???