An example pre-assembled wall panel may include a panel frame which includes a plurality of studs connected to opposing end members, first and second wall boards connected to opposite first and second sides of the panel frame, a plurality of spacers attached to at least one of the first and second wall boards and configured to support a finish panel in a spaced relation from the at least one of the first and second wall boards; and a pipe disposed between the first and second wall boards and extending between the opposing end members, wherein the pipe includes a pipe diverter, and wherein a free end of the pipe diverter passes through an opening in the first wall board or the second wall board.