Gentlemen, I have never seen this before. There is a mixture of galvanized and black steel pipe used in a wet system in a normal circa 1986 4-story office building in the Southeast.
Because I have never seen this before in thousands of buildings, I am assuming that this is a problem. Does anyone have further information? Thank you for your insight. _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
