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Brown PVC WH Vents

Mike Lamb

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The brown is only on one side of the pipe. On the verticals I suppose this could make sense since the elbows would direct the heat to that side. On the upper horizontal the brown is on the side, which does not seem to make sense. Also, was the pipe brown at the top of the lower horizontal. If not, than that does not make sense.

How about if the pipe was laying in mud for a while? Clay stains don't come off some materials very easy.

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