When it comes to the material used in home plumbing, water pipe systems have evolved. The plumbing in vintage and historical houses may have been made of iron, steel, or even lead, but these days copper and PVC piping are favored. They’re softer, lighter materials, easier to use and install, long-lasting, recyclable, and less corrosive and reactive.
But no piping is perfect. That’s why you may be seeing green spots on your older copper pipes.
The Meaning Of The Green
Have you ever wondered why the Statue of Liberty is green? Although the internal structure is made of iron and steel, the outside of Lady Liberty is coated with copper. When copper is exposed over time to oxygen in the air as well as the various acidic and basic components of rain, smoke, smog, and weather, it develops a green patina.