Fire System Backflow Preventer with OSY Valve - Ames 5000SS

Protect your commercial or industrial potable water supply from contamination caused by back-siphonage and back-pressure using the Ames 5000SS Fire System Backflow Preventer with OSY Valve. Designed for installation within fire protection assemblies, this reduced-pressure detector check assembly maintains a reliable pressure differential while accurately registering low flow rates to spot leaks or unauthorized water use early.

This assembly satisfies mandatory commercial codes for testing, inspection, and backflow prevention in fire protection systems, directly supporting compliance with NFPA 13 and NFPA 25 standards.

Key Features & Construction

• Corrosion-Resistant Build: Constructed with stainless steel and ASTM A536 ductile iron to provide mechanical strength in harsh environments.
• OS&Y Design: Features a visible stem that gives you a clear indication of valve status during routine inspections.
• Reduced Pressure Principle: Maintains a reliable pressure differential to protect the public water supply from reverse flow.
• Detector Check Functionality: Calibrated to register low flow rates so you can spot leaks or unauthorized water use early.
• Compact Body: Allows you to seamlessly install or retrofit the unit into existing infrastructure without taking up excessive space.
• Durable Internals: Relies on 300-series stainless steel internal parts to endure demanding conditions while maintaining accurate pressure monitoring for wet and dry sprinkler systems.

Technical Specifications & Compliance Table

Verify local Authority Having Jurisdiction (AHJ) requirements and consult manufacturer technical data sheets before installation. Note that this product is non-refundable and non-cancellable.

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