The 2-1/2" Double Check Assembly with OSY Valve is designed for fire protection professionals seeking reliable backflow prevention in commercial and industrial sprinkler systems. Combining durable materials and compliance with key fire safety standards, this assembly ensures safe, code-compliant operation where protecting potable water from contamination is critical.

• Robust Construction: Crafted from ASTM A536 ductile iron for enhanced strength and corrosion resistance, ideal for harsh mechanical environments.
• Corrosion-Resistant Internals: Springs and fasteners made from 300-series stainless steel withstand fluctuating water conditions without deteriorating.
• Reversible EPDM Check Valves: Elastomer discs provide reliable sealing and simplify maintenance, extending product life.
• Integral OS&Y Valve: Ductile iron body with brass stem offers manual shutoff and clear valve position indication for easier system control and monitoring.
• Strong Regulatory Compliance: UL Listed to UL 1469, FM Approved, and compliant with ASSE 1015 standards, meeting NFPA 13 and 25 requirements for fire protection systems.
• Operational Range: Rated for pressures up to 175 PSI and temperatures from 33°F to 140°F, handling typical fire protection water mains and ambient conditions.
• Flexible Installation: Compatible with standard NRS or flanged connections, supporting both horizontal and vertical flow orientations for versatile system integration.

This assembly safeguards potable water supplies from backflow contamination common in fire protection systems, which is vital for commercial buildings, industrial sites, and municipal fire mains. The integrated OS&Y valve enables straightforward isolation without disrupting service, facilitating routine inspections and maintenance while ensuring system readiness. By utilizing high-grade materials, this product reduces corrosion-related failures and lowers long-term maintenance expenses. Its adherence to recognized fire safety standards gives inspectors and facility managers confidence in compliance and reliability, making it a dependable choice for protecting property and occupants against fire hazards while maintaining water quality.