10" Double Check Backflow Preventer Valve with OS&Y Bypass by Ductile Iron

The 10" Double Check Backflow Preventer Valve with OS&Y Bypass by Ductile Iron is designed for professionals managing fire protection and potable water systems where preventing contamination is critical. This assembly combines robust materials and compliant features to deliver reliable backflow prevention, easy maintenance, and operational clarity in demanding commercial and residential environments.

• Durable Construction: Constructed from fusion-bonded epoxy-coated ductile iron (ASTM A536), providing exceptional corrosion resistance and mechanical strength for both underground and indoor installations.
• Corrosion-Resistant Components: Internal parts such as springs and fasteners are made from 300-series stainless steel, ensuring long-lasting functionality even in harsh water environments.
• Advanced Valve Modules: Utilizes glass-filled Noryl™ thermoplastic for check valve modules, enhancing impact resistance and maintaining dimensional stability for consistent performance.
• Reliable Sealing: EPDM elastomer discs serve as reversible, replaceable seats to maintain a positive, leak-free seal across varying pressure differentials.
• OS&Y Gate Valves: Both inlet and outlet feature Outside Screw and Yoke (OS&Y) valves, allowing straightforward flow isolation and a clear visual indication of valve status to minimize maintenance errors.
• Bypass "Y" Configuration: Enables pressure differential testing without disrupting system service, supporting compliance with local backflow testing regulations and NFPA standards.
• Compliance and Certification: UL Listed to UL 1469, FM Approved, ASSE 1015, and meets AWWA C510 standards, ensuring suitability for fire protection and potable water backflow prevention needs.
• Versatile Compatibility: Supports flanged (ANSI B16.1) and grooved end (AWWA C606) connections, accommodating diverse plumbing system layouts and installation requirements.
• Operational Capacity: Rated for working pressures up to 175 PSI (12.1 bar) and operational temperatures from 33°F to 140°F (0.5°C to 60°C), fitting a wide range of environmental and system conditions.

This backflow preventer valve mitigates contamination risks in non-health hazard potable water supplies while streamlining routine inspection and maintenance for fire protection systems. Its construction ensures long-term durability, reducing downtime and repair costs. The clear operational status via OS&Y valves and the built-in bypass line allow technicians to perform critical tests without interrupting water service, making it an essential component for compliance-focused plumbing professionals and fire safety engineers alike.