I am moving out of my house and taking the water softner with me. The homeowner before me made a mess of the loop. As part of the inspection it was requested that the loop be fixed and the drywall restored. Usually in Arizona I have seen a copper loop from the wall for the "soft water loop". Like this Mine appears to be cpvc comming from the main and cpvc going out. Here are the things I don't know. Does the loop need to be copper? If it does need to be copper whats the best way to go from cpvc to copper? Are than any other requirements or best practices I should know about? How would you do it if you were me?