LYWS Chicken Duck Hen Screw In Poultry Water Nipple Drinker Feeder (20pcs) Ideal for broilers, breeders, layers, pullets, ducks and game birds. Manufacturer recommends 3 birds per nipple. Delrin body, 360 side-action pin. Screw directly into PVC pipe, or use reducing tees with Teflon tape for round PVC pipe. Does not require a drip cup.