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  • Watts Series 957 Stainless Steel Flanged Backflow Preventer

    • Watts Series 957 4 in. Stainless Steel Flanged Backflow Preventer

    Part #W957NRSP

    | Item #1845380

    $3,775.91 each

    This product has been replaced by W957NRSFSP.

    Valve Size:

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    Product Details

    • Stainless steel housing and sleeve
    • Non-rising stem gate valves
    • Ball valve type test cocks
    • No special tools required for servicing
    • Bottom mounted cast stainless steel relief valve
    • Compact design allows small enclosures to be used
    • Patented torsion spring check modules for ease of serviceability
    • Groove couplings for ease of installation and pipe alignment
    • The maximum working pressure is 175 psi (12.06 bar)

    Documents

    Specifications

    • ADA Compliant
      No
    • ASSE Standards
      ASSE 1013
    • AWWA Specifications
      AWWA C-511 1992, AWWA M-22
    • Application
      Residential
    • BAA Compliant
      No
    • CSA Certified
      CSA B64.4
    • Coating
      Polymer
    • Collection
      Series 957
    • Color Finish
      Stainless Steel
    • Color Finish Category
      Stainless Steel
    • Depth
      35-41/100 in
    • End Connection 1
      Flanged
    • End Connection 2
      Flanged
    • End Connections
      Flanged
    • FM Approved
      Yes
    • Height
      38 in
    • High Pressure
      175
    • IAPMO Listed
      No
    • Installation Type
      Horizontal Mount
    • Lead Law Compliance Level
      Lead Law Compliant and Certified
    • Lead Law Compliant
      Yes
    • Length
      33-3/4 in
    • Material
      Stainless Steel
    • Material Type
      300, 304, Buna-N, Noryl®
    • Maximum Pressure
      175 psi
    • Maximum Temperature
      140
    • Minimum Temperature
      33
    • NSF Certified
      Yes
    • NSF Specifications
      NSF 61
    • Number of Handles
      Two Handle
    • Recommended Valve Application
      Health Hazard, Potable Water
    • UL Listed
      No
    • Valve Body Material
      Stainless Steel
    • Valve Body Style
      Inline
    • Valve Disc Material
      Silicone
    • Valve Operator
      Wheel Handle
    • Valve Seat Material
      Engineered Plastic
    • Valve Size
      4 in
    • Valve Stem
      Non-rising
    • Valve Type
      Reduced Pressure Zone Assembly
    • Weight
      200
    • Weight Capacity
      11.5
    • Width
      26 in

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