kathson Chicken Waterer Feeder Poultry Waterer Feeders Nipple Drinker(Set of 25 Pcs, Red) Ideal for broilers, breeders, layers, pullets, ducks and game birds. Manufacturer recommends 3 birds per nipple Does not require a drip cup. Screw directly into PVC pipe, or use reducing tees with Teflon tape for round PVC pipe.