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AMES C400 OSY - 8" - RP COLT SERIES ASSY - (0111588) - C400OSY8  


This 8 inch reduced pressure zone assembly backflow preventer helps 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, resilient seated gate valves with outside stem and yoke, test cocks, and a corrosive resistant stainless steel bottom mounted pressure relief valve.



  • UL and FM outside stem and yoke resilient seated gate valves
  • Bottom mounted cast stainless steel relief valve
  • 304 (Schedule 40) stainless steel housing and sleeve
  • Replaceable check disc rubber
  • Patented torsion spring check modules for ease of serviceability
  • Compact design allows small enclosures to be used
  • Health hazard application
  • The maximum working pressure is 175 psi (12.06 bar)
  • Groove couplings for ease of installation and pipe alignment


Backflow Preventer Type Reduced Pressure Zone Assembly
Body Finish Stainless Steel
Body Material Stainless Steel
Body Pattern Inline
Brand Watts
Buy American Act Compliant YES
Bypass No
Cap And Tether No
Disc Material Silicone
EAN 098268122169
Elbow Fitting No
Hazard Protection Level Health Hazard
Hot And Harsh Water No
Hydrant Connection No
Inlet Connection Size 8 IN
Inlet Connection Size-Metric 200 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 140
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 8 IN
Outlet Connection Type Flanged Joint
Outlet Shutoff Valve Type Outside Stem And Yoke Gate Valve
Outlet Thread Type Does Not Apply To Product
Part Number 0111588
Polymer Coating No
Pressure Operation Continuous
Protection Type Backpressure and Backsiphonage
Seat Material Engineered Plastic
Series 957
Strainer No
Tradename None
Type Kit



AMES C400 OSY - 8" - COLT SERIES Reduced Pressure Zone Assemblies - (0111588)

SKU: 0111588