Miller PW13 Ever Full Galvanized Pet Waterer, 3.25 gallon Automatic dog watering system that provides a continuous flow of the freshest water for your pet for your pet Attach the 3/4 inch Hose to your garden Hose turn on the tap and the Bowl fills to the perfect drinking level The automatic float controls the water level so there is no spilling or overflow Bowl is automatically replenished every time your dog drinks