Abstract: An automatic watering system may include a water-retaining vessel defining a water-retention chamber, and a partition positioned within the water-retaining vessel. The partition separates the water-retaining chamber into a valve chamber and a drinking chamber. The partition may include a first water passage at a first level and a second water passage at a second level that differs from the first level. A valve may be operatively connected to a water supply outlet within the valve chamber. The valve is configured to be moved between an open position in which the water supply outlet is opened, and a closed position in which the water supply outlet is closed. A deicer may be disposed within one of the valve and drinking chambers. The deicer is configured to heat the water within both the valve and drinking chambers.