such the electrical system 10 includes an ac power supply 12 a step down transformer 14 a sensor 16 and an ac solenoid actuated diaphragm valve 18 the output of the ac power supply 12 which is typically 120 volts ac is connected to the input to the transformer 14 the output of the transformer 14 which may be 12 volts ac is connected to the input of the motion sensor 16 the output of the sensor 16 is connected to the input of the solenoid actuated diaphragm valve 18 which controls the flow of water to the showerhead not shown an alternate embodiment of the present invention is shown in fig2 which is an electrical schematic diagram of a dc electrical system 30 to operate a dc solenoid actuated diaphragm valve 32 in this case the output of a dc power supply 34 which can be 6 volts dc is connected to the input to the motion sensor 16 whose output is connected to a dc solenoid actuated diaphragm valve 32 which controls the flow of water to the shower head not shown in either embodiment the sensor 16 may sense motion either by infrared or ultrasonic means or may be voice actuated to control the operation of either ac solenoid actuated diaphragm valve 18 or dc solenoid actuated diaphragm valve 32 referring now to fig3 an elevational view of either ac solenoid actuated diaphragm valve 18 or dc solenoid actuated diaphragm valve 32 is shown with a water supply line 40 being connected to its inlet port.