Pride Plumbing came out and provided a cost estimate to either rebuild a leaking three-handle bathtub/shower valve by replacing its stems, washers, seats, handles, and escutcheons or replace it with either a new Delta single-handle model or Gerber three-handle model (this would include cutting an access in the shower wall, replacing the valve along with short sections of its hot- and cold-water supply lines with new PEX piping and fittings, and adding new stems, washers, seats, handles, and escutcheons).