What does copper do for your drinking water?
Clean tap water is taken for granted, yet mains supply is never completely "sterile". Copper plumbing helps to ensure that the water from your taps is clean and hygienic. The copper tubes in your house inhibit the reproduction of microorganisms naturally present in water. And that makes your home just a little safer and more comfortable.
Can a copper tube rust?
No. Iron rusts but not copper. As a semi-precious metal copper reacts to environmental influences similarly to silver, for example, by forming a protective coating called a patina. This patina develops through oxidation of the copper with ambient oxygen. In the copper tubes of installations for drinking water, the oxide layer is formed by the reaction of the copper to the oxygen in the water and serves to protect the tube from further reaction.