[Pasgnetti]

[?]I'm knew with plumbing, I'm remodeling a bathroom and want to change the old galvanized pipes with copper. I have started using 1/2" copper pipes, but I'd like anyone to tell me if there's anyway to determine how to replace them. Say, if the pipes are 5/8 galvanized, can I go to 1/2" copper? or is there any table that might tell from one size to the other on different materials?[?]