Four Automatic Drinker Cups Backyard Poultry Chicken Birds Flock Watering SystemFour New Aftermarket Replacement Automatic Water Drinker Cup Tech Info: Drinker Cups require a low pressure water source. If connecting to household water lines, a pressure regulator must be used. Drinker Cups convert easily for side or bottom mounting Innovative way to provide always fresh water to your flock. As a bird drinks, the spring loaded tab is bumped, releasing more water into the cup Traditional waterers, on the other hand, need to be