Q: I have a very old shower stall. It has the original single-handle mixing valve that constantly leaks. I have not been able to find a plumber who wants to fix this valve. The last plumber who looked at it said parts are no longer available and it needs to be replaced with a new mixing valve. To do this will I have to open up the wall? Any other repair ideas I can explore to solve this issue?
A: A shower mixing valve is the main component in a shower’s plumbing system. But, just like any broken component, sometimes it may need to be replaced to solve the problem.