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Wilkins 375 1-1/2 in. RPZ Backflow Preventer
Wilkins 375 1-1/2 in RPZ Backflow Preventer

Our Price: $497.71
Sale Price: $429.48
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Product Code: WK375-150

Description Reviews
Wilkins WK375-150 1.5 inch Reduced Pressure Assembly
Wilkins WK375-150 1.5 inch Reduced Pressure Assembly

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Product Information


Designed for installation on potable water lines to protect against both backsiphonage and backpressure of contaminated water into the potable water supply. Assembly shall provide protection where a potential health hazard exists.

  • Housing: Reinforced Nylon, FDA approved
  • Fasteners: Stainless Steel, 300 Series
  • Elastomers:
    • Silicone (FDA Approved)
    • Buna Nitrile (FDA Approved)
  • Internals: Delrin, Nylon, NSF Listed
  • Springs: Stainless steel, 300 series
  • Ball Valves: Cast Bronze, ASTM B 584
  • Struts: Forged Brass, ASTM B 124
Dimensions (Shown below in diagram)
  • 1" Assembly: H - 13-3/4"; J - 15-1/4"
  • 1-1/2" Assembly: H - 18-3/4"; J - 20-1/4"
  • 2" Assembly: H - 20-3/4"; J - 20-3/4"
Wilkins 375 Series Reduced pressure Assembly Diagram
Features & Benefits
  • Maximum working water pressure: 175 PSI
  • Maximum working water temperature: 180° F
  • Hydrostatic test pressure: 350 PSI
  • End connections Threaded: ANSI B1.20.1
The Reduced Pressure Principle Backflow Preventer shall be ASSE® Listed 1013, rated to 180°F and supplied with full port ball valves. The main body shall be Nylon and the seat disc elastomers shall be silicone. If installed indoors, the installation shall be supplied with an air gap adapter. The Reduced Pressure Principle Backflow Preventer shall be a WILKINS Model 375.
Standards Compliance (Horizontal & Vertical)
  • ASSE® Listed 1013 (3/4" - 2")
  • IAPMO® Listed
  • CSA B64.4
  • AWWA compliant C511
  • Approved by the Foundation for Cross Connection Control and Hydraulic Research at the University of Southern California
  • UL® Classified (less shut-off valves only, 3/4"-2")
  • C-UL® Classified (less shut-off valves only, 3/4"-2")
Wilkins 375 Series Reduced Pressure Assembly Flow Characteristics
Typical Installation
Local codes shall govern installation requirements. To be installed in accordance with the manufacturers' instructions and the latest edition of the Uniform Plumbing Code. Unless otherwise specified, the assembly shall be mounted at a minimum of 12" (305mm) and a maximum of 30" (762mm) above adequate drains with sufficient side clearance for testing and maintenance. The installation shall be made so that no part of the unit can be submerged.

    Wilkins WK375-150 1-1/2 in RPZ Backflow Preventer

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