In the house we are leaving, we had originally planned to redo the Master Bath and decided to put copper piping into all the rooms with water except the Master, thinking we were going to seriously move things around. Well, that never happened and now we need to finish the copper piping. I think we need a professional for that part, but I have questions about the valves (pictures below).
1) Can the galvanized be replaced from below without ripping out the tile? Somehow they must have done it in the other bathroom, but I'm not sure how.
2) The hot leaks. It seems to be leaking on this side of the tile (judging by the blue streak from it) because there is no evidence of any water behind the wall. I went under the house after a long shower and the pipes going up into it (through a fairy large hole) and all the wood around and the dirt below were all dry and dusty with no water marks. Is that going to present a problem?
3) Do I have to get new valves? Is there anything I need to know to do that?