Jeff Wisnia wrote:
....
Chemical corrosion of copper pipes "from the inside out" caused by
impurities in the water supply is something I hear about, but don't have
any information on how to practically prevent it.

Cu pipes can also be eaten away by concrete. All the slab houses in
this are are seeing this. I replaced my original pipes with heavy
copper. The first ones lasted 30+ years and I don't expect to be
around to do the next replacement.