Fresh, clean, uncontaminated drinking water flows out the hollow nipple control into the hogí»s mouth. Shuts off automatically. All stainless steel. Works on the pressure 10-100 psi. Standard 1/2" male pipe thread. Adjustable water flow. No training problem. Proven performance, guaranteed satisfaction. Lets animals í¦nurseí¦ water from a mechanical nipple using a biting action that eliminates water waste from play and accidental operation. The valve screws directly onto a t or elbow to the main pressure line. Install 6" to 8" from a corner to prevent animals from using the drinker as a scratcher. Every valve has three different orifices for high/medium/low water pressure. One nipple drinker will service 12 pigs up to market size. 1/2" npt. Standard export packing, 100 pcs/box size:45x20x10mm 400 pcs/ctn