Black spots on copper pipes

Question

Some of our copper pipes have black patches on them. Is this a problem?

William · Accepted Answer

If you see black copper, it may indicate the presence of high sulfur levels or other chemicals in the air, like sewer gas. It could also indicate that the pipe is coming into contact with other non-compatible metals, especially galvanized steel. The worst-case scenario for black copper water pipes is that the builder installed extremely cheap copper that contains a high amount of impurities. Over time, those impurities manifest themselves on the surface of the pipe.

Hope this helps

Aaron · Answer

Copper is a reactive metal , oxidation is what these black spots are. In time, this could cause corrosion of the pipe , you could get the copper pipes cleaned or rub them down yourself, if a major concern you can have a plumber called out and take a look for you.

Stephen · Answer

It can be. It is usually the flux that has been used in the installation and hasn't been removed. if left it can corrode the copper pipe.

Stuart · Answer

Ruub pipe with steel wool..... if black dissapears its surface contamination only. No problem

Chris · Answer

The black marks will be from handling the copper it will be fine for a while

David · Answer

this could be old flux stains or mould they should not pose any problem for the tube.

Cameron · Answer

No, it's nothing to worry about,  copper discolours by things like condensation,  chemicals etc

Joshua · Answer

Hi yes so this means that there is high sulfar content levels or the pipe is coming into contact whith other metals that will corrode the copper if its near concrete this is another problem.

Amin · Answer

Hi 
No is just some stain from anything or oxidation 
So is no worries about

Black spots on copper pipes

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