8" Reduced Pressure Detector With OSY Domestic Valve

The 8" Reduced Pressure Detector With OSY Domestic Valve from Ames Backflows is engineered to isolate potable water supplies and prevent backflow events in heavy-duty commercial and residential waterworks and fire sprinkler connections. Installed within municipal supply feeds and dedicated fire protection assemblies, this unit utilizes advanced reduced pressure zone (RPZ) technology—employing a low-pressure zone between two independently operating check valves alongside an automatic relief valve—to actively block reverse flow, backpressure, and back-siphonage. By maintaining optimal flow rates for large-scale networks, this assembly satisfies cross-connection control requirements mandated by governing standards such as NFPA 13 for fire sprinkler system installation and NFPA 25 for the inspection, testing, and maintenance of water-based fire protection systems.

Integrated Outside Screw and Yoke (OS&Y) handwheel isolation valves positioned on both ends provide immediate visual verification of open or closed status during routine operations or emergency shutdowns. Thoughtfully placed test cocks streamline required periodic testing and field inspections, minimizing system downtime and satisfying local compliance mandates.

Key Features & Construction

Red-Painted Cast Iron Body: Heavy-duty, corrosion-resistant metal construction provides structural rigidity for high-capacity networks.
Polished Stainless Steel Relief Valve Chamber: Protects internal components against harsh environmental wear and continuous water contact.
Advanced RPZ Technology: Incorporates a dual check system with an automatic relief valve to create multiple defensive layers against backpressure and back-siphonage.
Integrated OS&Y Valves: Handwheel isolation valves offer clear visual status tracking for rapid operational control.
8-Inch Sizing: Engineered specifically for large domestic waterworks and fire sprinkler connections to maintain uninhibited flow rates.
Simplified Maintenance Layout: Accessible inline test cocks and components allow straightforward routine field testing.

Technical Specifications & Compliance Table

Contractors and facility managers must verify all local Authority Having Jurisdiction (AHJ) cross-connection control requirements and consult the manufacturer's technical data sheets prior to installation. Note: This item is non-refundable and non-cancellable.

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