The Edstrom Wet Feeder Valve has been selected by many major manufacturers of swine feeding equipment because of its quality and reliability. When mounted vertically in the feeder, the pig is able to easily activate the valve by touching the stem with their nose, causing water to be discharged into the pan of the feeder. Factory calibrated to discharge 2 quarts per minute at 40 psi. Operating range of 0-50 psi. 5 year Manufacturer’s Warranty.