Mike Lamb Posted January 13, 2016 Report Share Posted January 13, 2016 What does it mean when PVC vents are brown? Over heating? These are to 2 gas water heaters. Click to Enlarge 39.32 KB Quote Link to comment Share on other sites More sharing options...
BADAIR Posted January 13, 2016 Report Share Posted January 13, 2016 http://plumbingengineer.com/content/pvc ... flue-gases Quote Link to comment Share on other sites More sharing options...
Mike Lamb Posted January 13, 2016 Author Report Share Posted January 13, 2016 Thanks. Good reading. Why did you attach the ICC's infringement concerns with IAPMO? Quote Link to comment Share on other sites More sharing options...
Scottpat Posted January 14, 2016 Report Share Posted January 14, 2016 Yes, that is a sign that their flue gases are too hot! Quote Link to comment Share on other sites More sharing options...
mjr6550 Posted January 14, 2016 Report Share Posted January 14, 2016 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. Quote Link to comment Share on other sites More sharing options...
John Kogel Posted January 14, 2016 Report Share Posted January 14, 2016 How about if the pipe was laying in mud for a while? Clay stains don't come off some materials very easy. Agreed. Both sections are stained at the lettering. Non-issue. Quote Link to comment Share on other sites More sharing options...
BADAIR Posted January 17, 2016 Report Share Posted January 17, 2016 Thanks. Good reading. Why did you attach the ICC's infringement concerns with IAPMO? posting on another site & attached here removed...thnx Quote Link to comment Share on other sites More sharing options...
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