Watts 0009257 3/4" Lead Free Water Pressure Reducing Valve LF25AUB-Z3 Series is designed to reduce incoming water pressure to protect plumbing systems and reduce water consumption for commercial, industrial, and residential applications. The easy maintenance assembly consists of a replaceable seat module, NPT threaded female union inlet by NPT female outlet and a bypass feature to control thermal expansion pressure. The temperature range is 33 to 160 degrees F (0.5 to 71 degrees C). The standard pressure setting is 50 psi (345 kPa) with maximum working pressure at 300 psi (20.7 bar).