The Little Giant Trough-O-Matic Float Valves are the perfect way to automate the water supply to stock tanks, troughs and barrels. They are easy to install and have a 375 gallon per hour capacity. The one piece plastic float is blow molded from durable polyethylene and is maintenance free. Trough-O-Matic Float Valves contain adjustable brackets to control the water level and a reversible neoprene valve seat for longer life. They fit all models of plastic and metal stock tanks.