Can old pipes be replaced?
Old pipes not only can, but also need to be changed, otherwise they can leak at the most inopportune moment. Of the trusted companies, I can recommend this one https://pomplumbing.ca/kitec-piping-replacement/ , since I contacted them myself after buying a house. The house was old, with numerous gaps in the sewerage, and it was impossible to operate it before the repair. But after that it became pleasant and comfortable to live. That's what quality repair means.