I know that there are "outdoor shower" units, with the head, valves, handles, all made as one unit. They allow the water to "weep" out the valves after shutoff, to prevent freezing. This looks to be custom pipe work by a plumber, but I wanted to at least ask if this was sold as a unit, or if someone piped this in and sweat the joints, and if so, where did the 2 heads come from?