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New Member
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Aug 8, 2012, 09:45 AM
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The plumbing pipes have turned black in my crawl space. Is that a big problem? Mold?
I am in the process of buying a home that was built in 1967. There is moisture in crawl space, there was standing water that got cleaned up. The inspector noticed several of the plumbing pipes turned black. There is no chinese dry wall. Should I be worried about this? Or is this some normal discoloration on cast iron pipes?
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Eternal Plumber
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Aug 8, 2012, 03:49 PM
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should I be worried about this? Or is this some normal discoloration on cast iron pipes?
Cast iron pipes are coated with tar. All cast iron pipes are black. Good luck, Tom
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New Member
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Aug 8, 2012, 04:00 PM
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Sorry, just heard back from seller that pipes are copper. Not all of them are turning black. I read on few sites that copper turns green over time, the color is black though, not gree. Still OK?
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Eternal Plumber
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Aug 8, 2012, 05:02 PM
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 Originally Posted by skreeger
sorry, just heard back from seller that pipes are copper. not all of them are turning black. i read on few sites that copper turns green over time, the color is black though, not gree. still ok?
We started with cast iron. When did it change to copper. Copper will turn green from the acid in the flux. Over the years copper can develop a black finish. It doesn't hurt the pipes. If it bothers you take some steel wool and go over the pipes. Good luck, Tom
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New Member
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Aug 9, 2012, 10:12 AM
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 Originally Posted by speedball1
We started out with cast iron. When did it change to copper. Copper will turn green from the acid in the flux. Over the years copper can develop a black finish. It doesn't hurt the pipes. If it bothers you take some steel wool and go over the pipes. Good luck, Tom
Thanks Tom, I am relived.
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Home Improvement & Construction Expert
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Aug 9, 2012, 10:55 AM
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Post a pic.
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New Member
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Aug 9, 2012, 11:16 AM
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 Originally Posted by hkstroud
Post a pic.
here you go
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Home Improvement & Construction Expert
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Aug 9, 2012, 08:40 PM
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Copper pipes. Cast iron stack.
Tarnished and lots of cob webs.
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