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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should I be worried about this? Or is this some normal discoloration on cast iron pipes?

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Cast iron pipes are coated with tar. All cast iron pipes are black. Good luck, Tom

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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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?

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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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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

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Thanks Tom, I am relived.

Post a pic.

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Originally Posted by hkstroud

Post a pic.

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here you go

Attachment 40978

Attachment 40979

Attachment 40980

Attachment 40981

Copper pipes. Cast iron stack.
Tarnished and lots of cob webs.