Free Range 1000263 Double Wall Poultry Drinker, 2-Gallon, Galvanized SteelThanks to heavy duty galvanized steel and double wall construction, this 2 gallon poultry fountain provides a generous supply of cool water to promote intake for up to 22 birds. Constant water level maintained in pan by vacuum, so not floats to get stuck or replaced. Features visible locking device, roost prevention top plus inner tank has brass valve with rubber sealing washer for positive shut off. Capacity: 2 gallon (7. 5 liters) Handles up to 22