Watts 1/2 LFN55B-M1 Valve, 1/2" NPT Threaded Female Inlet x NPT Female Outlet Water Pressure Regulator - Lead Free

SKU: 575126
Brand: Watts Model: 1/2 LFN55B-M1 Condition: New

Watts 1/2 LFN55B-M1 Water Pressure Regulators

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A brand of Watts 1/2 LFN55B-M1 Water Technologies, Watts Regulator Company is an innovative manufacturer of water quality products for your plumbing needs. The Watts Valve, 1/2" NPT Threaded Female Inlet x NPT Female Outlet Water Pressure Regulator - Lead Free is used in commercial and residential applications to reduce incoming water pressure to a sensible level for protection of plumbing system components and to reduce water consumption. It consists of a bronze body construction integral stainless steel strainer, thermoplastic seat, bronze sealed spring cage for waterworks pit installations and thermal expansion bypass. Available with NPT threaded female inlet x NPT female outlet connections. Maximum Working Pressure: 400psi (27.6 bar), Adjustable Reduced Pressure Range: 25 to 75psi (172 to 517 kPa), Standard Pressure Setting: 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.


• Lead Free brass body construction (option DU)
• Ideal for residential and commercial applications
• Integral stainless steel strainer and built in bypass
• Water savings up to 30 percent
• Thermoplastic seat
• Serviceable in line
• Bypass feature controls thermal expansion pressure (Bypass will not work if inlet pressure is above 150psi, 10.3 bar)
• Sealed spring cage on all models for accessible outdoor or pit installations


• Replaces: Watts 1/2 N55B-M1
• Product Number: 0009538
• NPT Threaded Female Inlet x NPT Female Outlet
• Size: 1/2 inch, 15mm
• Temperature Range: 33
• 180 Degrees F (0.5
• 82 Degrees C)
• Maximum Working Pressure: 400psi (27.6 bar)
• Adjustable Reduced Pressure Range: 25 • 75psi (172 • 517 kPa)
• Standard Reduced Pressure Setting: 50psi (345 kPa)
• Meets requirements of ASSE Standard 1003; (ANSI A112.26.2) and CSA Standard B356. Certified by NSF to ANSI/NSF Standard 61-8 (LF N55B-M1 Models only). Listed by IAPMO and City of Los Angeles.

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