Double Wall Pipe Turning Black

naturalstuffDecember 12, 2008

The pipe sticking above roof is turning black from right underneath the rain cap to about 10 inches down. It started at 4 inches which I thought was normal but it seems to keep moving down.

Is this because it's from Lowes? Its a double wall stainless steel 6" pipe.

Only installed it 3 weeks ago.

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