Commercial Bargains 10 Automatic Water Drinker Spring Cup Mount Float Chicken Poultry Chicken Waterer Cups with 1/2" PVC brackets Recommended 2 to 3 birds per each drinker cup Ideal for broilers, breeders, layers, pullets, ducks and game birds. Use with low pressure systems only Every time they drink from the cup, the low amount of pressure allows the right level of water to come into the cup