An automatic float valve works by allowing liquid within the chamber to lift a float which is linked to a valve which regulates the liquid intake. When the level is low, the float drops and opens the valve, allowing in liquid until the float rises sufficiently to close off the valve again. This is identical in principle to our hog waterer. This automatic float valve automates the water supply for hog watering. Metal, non-siphoning, automatic hog waterer with compact. space-saving bowl. Waterer is 7'' long, 5-1/2'' wide and 1/2'' mipt connection for baby pigs or full grown hogs.