Automatic float valve designed to control the water level in plastic and metal stock tanks, troughs, barrels, and pans. Operates at 20 to 50 PSI and provides a flow capacity of up to 245 gallons per hour. Accepts 3/4-inch garden hose thread and is available in plastic or metal versions. Wide-tank models include expansion brackets to fit tank rims up to 2 inches thick and 4 3/8 inches wide, while the TM825AS plastic model complies with basic back-siphoning regulations.