I called a plumber to repair what I thought were three small water leaks under the house (crawl space). The house is about 65 years old. He found several more but also that the piping was a complete mess, copper pipe joined with galvanized etc, He recommended a complete repiping job up to the fixtures. That would have required making holes in bathroom tile that couldn't be replaced so I decided only to repipe up to the risers. The question is to use copper pipe or CPVC. The risers are galvanized. The additional cost for the copper is $800.00. Is the extra cost for installing copper worth it?