My house was built in 1954, and I
am trying to replace the faucet fixtures in my tub. While removing the old valves, I noticed that the new valves do not fit into the original 3-way splitter. I may need to break down part of the wall to get at the splitter to replace it. However, the bathroom is at the back of the house. Should I go through the outside (stucco) wall or the inside tile wall ? FYI, I have a large crawl space under the house.