Pride Plumbing came out and provided a cost estimate to perform the following work: 1) replace a bathtub/shower's drain assembly, P-trap, and drain line through the floor to under the house in the crawlspace, and to where it ties into the main sewer drain stack, with a new Watco drain and PVC piping and fittings; and 2) replace a bathtub/shower valve with a new Delta R10000-UNBX rough-in valve (this would include cutting an access in the shower wall; adding a Delta T13220 chrome trim kit (replacing the shower head, valve cover and handle, overflow cover, and downspout push button diverter); converting the valve's above-floor hot and cold water supply lines to PEX piping and fittings - tying them into the home's existing copper main water lines; and installing a plastic plumbing access panel over the hole we cut in the wall).