pilot light 104 when lit indicates that electrical control unit 70 has power when there is no power to electrical control unit 70 light 104 is off and electro mechanical valve 58 will be in the closed position contacts 106 represent the state of switches 50 and 52 in flow detector f contacts 106 are normally open when there is no water flow when flow detector f detects water flow and switches 50 and 52 are actuated contacts 106 will close and time delay relay 108 will be energized flow indicator light 110 then comes on indicating that contacts 106 are closed and that there is water flow time delay relay 108 is a variable delay on energizing type relay the timer period for time delay relay 108 starts timing when energized the transfer of contacts 118 will take place i e the relay 108 will actuate contacts opening them if closed and closing them if open if and when time delay relay 108 times out if water flow stops before time delay relay 108 times out contacts 106 will open and time delay relay 108 will reset to zero time and no further action takes place if water flow continues beyond the interval set on time delay relay 108 contacts 118 will transfer when transfer occurs if contacts 116 are closed indicating the override function is not in operation the closure of.