the inlet pipe 102 and cover the access hole 106 a the proximate end 103 of the inlet pipe 102 is removably connected to a diverter valve coupling 112 which joins the inlet pipe 102 in fluid communication to a diverter valve 120 in its resting state the diverter valve 120 allows water to pass from the inlet pipe 102 through the body of the diverter valve 120 then through a primary diverter valve outlet 122 to a primary shower head 130 and then exit through the face 136 of the shower head 130 the shower head typically already in place prior to installation of the device of the present invention 100 may be selected for use as the primary shower head 130 typically the selected primary shower head 130 is connected to the diverter valve 120 via a primary shower head connection pipe 132 when the diverter valve 120 is in its resting position the primary shower head 130 functions as a conventional shower head providing only water to the body of the user in addition to the inlet pipe 102 and the primary shower head 130 a metering valve 140 is also in fluid communication with the diverter valve 120 through a secondary diverter valve outlet 124 a pipe 142 or other suitable device may be used to connect the metering valve 140 to the diverter valve 120 when the diverter valve 120 is in.