Ames 3 Inch Reduced Pressure Detector Assembly OSY Valve SKU300

Protect your potable water supply with this 3-inch reduced pressure detector assembly designed for residential fire protection systems. It prevents backflow contamination during pressure fluctuations, ensuring your water stays clean and safe. The unit installs inline to safeguard municipal water networks against high-hazard cross-connections.

This assembly satisfies stringent municipal inspection protocols and complies directly with NFPA 13 and NFPA 25 standards for code-compliant fire protection installations. Pre-drilled test cocks enable mandatory annual backflow testing and differential pressure assessments required by regulatory authorities.

• Ductile Iron Body: Fusion-bonded epoxy coating resists corrosion in demanding plumbing and vault environments.
• Stainless Steel Internals: Internal components utilize stainless steel springs and 300-series fasteners for long-lasting durability.
• OS&Y Isolation Valves: Outside Screw and Yoke valves provide reliable system isolation for maintenance without shutting down your entire supply.
• Working Pressure: Handles continuous working pressure up to 175 PSI.
• Temperature Range: Supports operational temperatures from 33°F to 140°F.
• Flexible Mounting: Supports grooved or flanged end connections and installs in either horizontal or vertical orientations.

Install this assembly in accessible mechanical rooms or underground vaults with adequate clearance to operate the OSY valves and conduct routine testing. Always verify local Authority Having Jurisdiction (AHJ) requirements prior to installation.

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