are not conducive to placement in a wet environment following is described an embodiment in which valve controls are placed within the shower stall and the driving mechanisms are sealed so as to allow placement in a wet environment in the present invention stepper motors under the control of a central processing unit cpu 21 actuate the two orthogonal movements of the valve a temperature sensor 14 is provided to measure the output temperature of the water on its way to the shower head on a continuous basis said temperature is compared to a preset temperature which can be set through the display and controls unit 22 in fig4 when a deviation from the preset temperature is identified that difference is monitored by the cpu the cpu then provides a signal to the stepper motor controlling the admixing lever in the axial direction of the valve to increase or decrease the ratio of the hot water and cold water provided if the flow rate deviates from a preset flow rate as set through the display and control system the cpu will direct electronic drivers within the control units to actuate the stepper motor acting on the valve 39 s lever within a plane containing the valve axis until the correct flow rate is achieved in an alternative embodiment a single stepper motor can control both orthogonal movements of the valve for instance the shaft of the single motor may be extended to include a two parts the.