Automatic water supply system for animals

A wall mounted automatic animal watering system for large domesticated animals comprising:

• a basin, said basin having an interior wall defining a water holding trough, an outer wall open at its back, and a removable access plate affixed to an open bottom of the outer wall;
• wherein said interior wall, said outer wall, the wall to which the watering system is mounted and said removable access plate together enclose and define an interior protected cavity;
• a plurality of non-contact water level sensors mounted at different vertical locations built into the interior wall wherein one of the plurality of water level sensor is arranged as a low water level sensor, and is arranged to trip a low water level signal;
• a drain including a tee fitting including a straight port and a side port, connected to the drain and located below the basin;
• a water inlet connected to a solenoid valve in communication with the side port of the tee fitting, and a removable stopper or cleanout valve in communication with the straight port of the tee fitting, wherein the tee fitting, the solenoid valve and the removable stopper or cleanout valve are all contained within the interior protected cavity;
• and
• electronic circuitry and a power source also contained within the interior protected cavity,
• wherein the solenoid valve, removable stopper or cleanout valve, electronic circuitry and power source are all accessible through the open bottom of the outer wall by removing the access plate, while leaving the water holding trough in place, mounted on the wall, whereupon the water holding trough may be drained and cleaned without being removed from the wall to which the animal watering system is mounted.