Watts LFN55B Lead-Free Pressure Regulator 1" FNPT

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AB1953 Compliant 

Part Number: PRV-10-LFN55BM1
Alt. Part Number: 0009638
This item is obsolete and has no replacement from the manufacturer. Please contact one of our Certified Water Specialists to discuss replacement options.

LFN55BU 1" FNPT Pressure Regulator Features:


  • Commercial & Residential Applications
  • Reduces incoming water pressure for protection of plumbing system components and to reduce water consumption
  • Integral stainless steel strainer
  • Thermoplastic seat
  • Lead Free Brass body construction
  • Serviceable in line
  • Bypass feature controls thermal expansion pressure
  • Sealed spring cage on all models for accessible outdoor or pit installations

LFN55BU Water Pressure Reducing Valve Specifications:


  • Size: 1" 
  • FIPNPT Connection 
  • Max Working Pressure: 400 PSI 
  • Adjustable Range: 25 To 75 PSI 
  • Pressure Setting: 50 PSI 
  • Max Temp: 180 degrees F 
  • Height: 6.25", Width: 5.625" 
  • Standards: ASSE 1003, ANSI A112.26.2 & CSA Standard B356

Watts Water Pressure Reducing Valve Specification Sheet
Watts Water Pressure Reducing Valve Installation Instructions
Watts Warranty Information
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Operating Specs
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