Im remodeling my 35 year old bathroom and completely gutting it down to the studs. Should I replace all pipes that are exposed when I have the walls and floors open to be proactive incase of leaks in the future. I plan on tiling all 4 walls from the floor to ceiling as well as the floor and would hate to have to open something up in a few years because of a leak. But I would rather not re-plumb if not necessary.