I think there's a big difference between lack of competence and lack of knowledge. That's why I come here. The broken diverter means I need to replace the whole valve body, and the acid water is what weakened & eventually fractured the diverter tube. No incompetence there.
What is the significance of the distance from the centerline of the valve body to the place on each tap where the threads for the bezel begin?
My current Elger is about 2 1/2" long. The new production stuff I have seen has a much shorter distance. About an inch shorter. I don't know where to look in the catalogs for specifying that distance, to get a replacement with the same length.
If the replacement is shorter by an inch then it seems that I need to also buy a bezel specially for that length, which will project backwards into the wall to reach the threads? Seems like buying just the valve body is not going to work out; might as well get the whole kit even though I don't need the showerhead or spout.
And how do you reach so far back to remove a ceramic stem? Special tool like a deep socket? I want the tool for whatever brand/style I end up getting.