Series LF25AUB-Z3 Water Pressure Reducing Valves are designed to reduce incoming water pressure to a sensible level to protect plumbing system components and reduce water consumption. This series is suitable for water supply pressures up to 300psi (20.7 bar) and may be adjusted from 25 – 75psi (172 – 517 kPa). The LF25AUB-Z3 features Lead Free* construction to comply with Lead Free* installation requirements. The standard setting is 50psi (345 kPa). All parts are quickly and easily serviceable without removing the valve from the line. The standard bypass feature permits the flow of water back through the valve into the main when pressures, due to thermal expansion on the outlet side of the valve, exceed the pressure in the main supply. Features, Sealed spring cage for accessible outdoor or pit applications , For water supply pressures up to 300psi, Integral stainless steel strainer and bypass feature that controls thermal expansion pressure , Designed for easy in-line servicing; has replaceable seat module.From the Manufacturer: Series LF25AUB-Z3 Lead Free* Water Pressure Reducing Valves are used in commercial and residential applications to reduce incoming water pressure to a predetermined level, thereby protecting downstream plumbing system components and reducing water consumption. Designed for easy accessibility and serviceability without removing the valve from the line. For versatility, a variety of end connections are available: threaded, solder, PEX, quick-connect, and CPVC with union and double union. Standard pressure setting is 50psi with an adjustable range of 25 ‒ 75psi (172 ‒ 517 kPa).