Patent ID: 7395559

Claim:
An apparatus for controlling water level in a pool, the apparatus comprising: a water level sensor adapted to be immersed in the pool water; a processor positioned within a housing and electrically connected with the sensor to detect low water in the pool; a wireless transmitter electrically connected with the processor for sending a low water signal if the processor detects the low water; a power source for powering the processor; a tilt switch connected between the power source and the processor for supplying power to the processor while in an on position, the tilt switch enclosed within the housing and movable between the on and off position by tilting the housing; a remote wireless receiver for receiving the signal from the transmitter and turning on a valve to add water to the pool; and wherein the receiver has an overfill counter that turns on for a selected interval when the receiver receives one of the low water signals from the transmitter, the overfill counter causing the valve to remain on until the overfill counter reaches a selected count, and wherein the receiver is adapted to reset the overfill counter prior to reaching the selected count each time that the receiver receives a subsequent low water signal from the transmitter.