The emergency battery will turn on for approximately 24 hours. If the power outage persists, the system automatically shuts down and turns off the water supply until the electricity returns. If needed, it is possible to manually open the water supply by lifting and turning the knob on the servomotor. Once the valve is on the open position, push the knob back to its original position. When power is restored, the servomotor will automatically resume control of the valve.