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957N-DOSY 4

Part of the 957 Series

Ordering Code: 0113046

UPC: 098268287370

Lead Free: YES

4 In Ss Reduced Pressure Zone Assembly, Domestic Osy Shutoff Valves, N Pattern

This 4 inch N pattern reduced pressure zone assembly is designed to prevent the reverse flow of fire protection substances and water of non-potable quality from being pumped or siphoned into the potable water supply due to backsiphonage and or backpressure in accordance with national plumbing codes and water authority requirements. This extremely compact and lighter than a traditional designed assembly is approved for horizontal installation as long as the backflow assembly is installed in accordance with the direction of the flow arrow. It is ideal for protection in continuous pressure piping applications and at cross-connections identified as health hazards and from other contaminants found at the service line entrance. This assembly consists of a stainless steel body with a quick access sleeve, torsion spring check valves, domestic outside stem and yoke resilient seated gate valves, test cocks, and a corrosive resistant stainless steel bottom mounted pressure relief valve.

Product Features

  • Patented torsion spring check modules for ease of serviceability
  • Domestic outside stem and yoke gate valves
  • Health hazard application
  • Groove couplings for ease of installation and pipe alignment
  • No special tools required for servicing
  • Compact design allows small enclosures to be used
  • The maximum working pressure is 175 psi (12.06 bar)
  • Stainless steel housing and sleeve
  • Bottom mounted cast stainless steel relief valve
Backflow Preventer Type Reduced Pressure Zone Assembly
Body Finish Stainless Steel
Body Material Stainless Steel
Body Pattern N-Pattern
Brand Name Watts
Bypass No
Cap And Tether No
EANUCCCode 098268287370
Elbow Fitting No
Hazard Protection Level Health Hazard
Hot And Harsh Water No
Hydrant Connection No
Inlet Connection Size 4 IN
Inlet Connection Size-Metric 100 MM
Inlet Connection Type Flanged Joint
Inlet Shutoff Valve Type Outside Stem And Yoke Gate Valve
Inlet Thread Type Does Not Apply To Product
Lead Free YES
Maximum Temperature-Fahrenheit 110
Maximum Working Pressure-BAR 12.10
Maximum Working Pressure-PSI 175
Meter Type No Meter
Minimum Temperature - Celsius 0.50
Minimum Temperature-Fahrenheit 33
Outlet Connection Size 4 IN
Outlet Connection Type Does Not Apply To Product
Outlet Shutoff Valve Type Outside Stem And Yoke Gate Valve
Outlet Thread Type Does Not Apply To Product
Part Number 0113046
Polymer Coating No
Pressure Operation Continuous
Protection Type Backpressure and Backsiphonage
Series 957
Strainer No
Type Valve to Accessory

Product Accessories