by ThatWasClose on 20 March 2020 - 20:03
This article explains it far better than I ever could:
I am nearly dinosaur age, so I well remember copper & brass hardware everywhere.
As an aside, I still keep pure refined copper rounds and bars in the water troughs for my livestock; though more so for helping to control algae growth. I would never just toss a raw copper nugget into a water trough, as unrefined copper could potentially have an unwanted level of lead in it. All luck of the draw of where it was mined. So if you are going to use copper, get the highly pure refined stuff. One ounce rounds to large bars very cheap to buy at a coin/bullion dealer; & if you trust the seller enough on EBay. I do not suggest using copper pipe for household water use. Why? There may actually be lead content.