Pride Plumbing came out, and after cutting an access in the wall, replaced a leaking three handle bathtub/shower faucet valve with a new Delta R10000-UNBX rough-in valve; added a Delta T13220 chrome trim kit (replacing the shower head, valve cover and handle, overflow cover, and downspout push button diverter); converted the valve's copper above-floor hot and cold water supply lines to PEX piping adding ProPress fittings - tying them into the home's existing copper main water lines; and installed a plastic plumbing access panel over the hole we cut in the wall.