Series ST375, ST500, ST750, ST1000, ST1250, ST1500, ST2000 Standard Duty Mechanical Float Valves are used in commercial, industrial, and agricultural applications for controlling water flow. It has a bronze body construction with male NPT threaded end connections on 3/8 to 1 in. (10 to 25mm) models and female NPT inlet-open outlet on 1 1/2 to 2 in. (40 to 50mm) models, cotter pin pivot arm assembly, replaceable seals, and replaceable plungers. This series is ideal for use in air conditioning, refrigeration, and irrigation systems. Maximum Pressure: 125 psi (8.7 bar).