WATTS® 0009431 LF25AUB-Z3 Pressure Reducing Valve, 1-1/2 in Nominal, FNPT Union x FNPT End Style, 25 to 75 psi Pressure, Cast Copper Silicon Alloy Body, Domestic

WALF25AUBM MFG #: 009431
  • Country of Origin: US
  • Dimensions: 8-1/4 in L x 4-1/16 in W x 9-1/2 in H
  • Domestic/Import: Domestic
  • End Style: FNPT Union x FNPT
  • Manufacturer Name: Watts Water Technologies
  • Media: Water
  • Nominal Size: 1-1/2 in
  • Pressure Range: 25 to 75 psi
  • Series: LF25AUB-Z3
  • Softgoods Material: Stainless Steel
Series LF25AUB-Z3 Lead Free* Water Pressure Reducing Valves are used in commercial and residential applications to reduce incoming water pressure for protection of plumbing system components and to reduce water consumption. It consists of a Lead Free* copper silicon alloy body construction, union inlet connection, integral stainless steel strainer and high temperature resistant reinforced diaphragm for hot water. The Series LF25AUB-Z3 is available with a variety of end connections including: threaded, solder, PEX, quick-connect and CPVC with both union and double union connections. Series LF25AUB-Z3 has an adjustable pressure range and is serviceable in-line. Maximum Working Pressure: 300psi (21 bar), Adjustable Reduced Pressure Range: 25 to 75psi (172 to 517 kPa), Standard Pressure Setting: 50psi (344kPa).
  • Features and More


  • Standard construction includes Z3 sealed spring cage and stainless steel corrosion resistant adjusting and cage screws for accessible outdoor or pit installations
  • Integral stainless steel strainer
  • Replaceable seat module
  • Serviceable in line
  • Bypass feature controls thermal expansion pressure
  • High temperature resistant reinforced diaphragm for hot water
  • The wetted surface of this product contacted by consumable water contains less than 0.25% of lead by weight
  • The bypass feature will not prevent the pressure relief valve from opening on the hot water supply system with pressure above 150 psi
  • 50 psi standard reduced pressure
  • Reinforced EPDM with PTFE wetted surface diaphragm
  • The bypass feature will not prevent the pressure relief valve from opening on the hot water supply system with pressure above 150psi


  • Commercial and Residential


  • Z3 Sealed Spring Cage and Stainless Steel Corrosion-Resistant Adjusting and Cage Screws


  • ANSI A112.26.2
  • ASSE 1003
  • CSA B356
  • IAPMO Listed
  • Military Standard MIL-V-18146B
  • Southern Standard Plumbing Code
  • PROP65: This product can expose you to chemicals including lead which is known to the State of California to cause cancer and birth defects or other reproductive harm.


  • Limited