[Hugh R]

Late to this, but my pipes are in the attic, I see yours come from below. When I redid my showers, I put in shutoff valves in the attic for the showers. If you think about it, every sink and toilet in a house has a shut-off valve on each line, but showers don't. If you have a valve problem you have to shut all the water to the house off while you deal with the issue. A small water-tight access box that is sort of decorative might be something to think about.