8" 4000SSOSY RP Backflow Preventer Valve by Ames

The 8" 4000SSOSY RP Backflow Preventer Valve by Ames is engineered to protect potable water supplies from contamination in commercial fire protection and water delivery systems. Installed within mainline assemblies, this reduced pressure principle device prevents dangerous backflow and back-siphonage events, ensuring your fire suppression infrastructure meets strict municipal plumbing codes and safety mandates under standards such as NFPA 13 and NFPA 25.

Designed for streamlined deployment on large-scale commercial job sites, this heavy-duty valve features an integrated OS&Y (Outside Screw and Yoke) shutoff valve configuration that provides clear, visual open/closed positioning from a distance. Its robust, corrosion-resistant build handles harsh operating environments and high-pressure demands, while the user-friendly assembly helps mechanical contractors minimize labor time and installation overhead.

Key Features & Construction

• Robust Build: Constructed with heavy-duty materials designed to withstand harsh operating environments and high-pressure thresholds.
• Optimized Function: Effectively blocks backflow to keep potable water supplies pristine and fire suppression systems operating properly.
• Streamlined Setup: Features a user-friendly design that simplifies mechanical installation to save time and reduce labor costs on site.
• Integrated OS&Y Valves: Equipped with outside screw and yoke gate valves to allow immediate visual verification of valve status.

Submittal & Installation Note: Contractors must verify local Authority Having Jurisdiction (AHJ) requirements, plumbing codes, and specific cross-connection control mandates prior to installation. Please note that this commercial item is non-refundable and non-cancellable.

Documentation: Download Manufacturer Technical Data & Cut Sheet (PDF)