Little Giant Automatic Plastic Trough Waterer KitNo need to worry about water pressure or freezing pipes with this waterer! This gravity fed waterer provides a continuous flow of fresh water for adult poultry. Kit includes 20 inch plastic drinking trough with float valve, 6 feet of flexible tubing, 2 gallon water tank and a filter. Automatic float controls the water level so there is no spilling or overflow. Easy to assemble and clean.