Abstract: A two-head shower arm, of integral, one-piece construction, having a rectilinear, straight pipe and upstream and downstream depending pipe portions, all having the same inside diameters and possessing the inherent and self-contained functional attributes and qualities of substantially the same volumetric water discharges from both depending pipe portions, without recirculation, surge or hammer; and adapted for free-standing cantilever mounting relationship with an existing water supply outlet fitting in a shower enclosure's vertical side wall to dispose thereby shower heads carried by the depending pipe portions in the same horizontal plane in normal relationship with the vertical side wall.