BYM Water Nipple Drinker Chicken Feeder Poultry Duck Hen Screw, Oasis Poultry Water Nipples (10) Ideal for broilers, breeders, layers, pullets, ducks and game birds. Manufacturer recommends 3 birds per nipple. Screw directly into PVC pipe, or use reducing tees with Teflon tape for round PVC pipe. Delrin body, 360 side-action pin.