The 3" Double Check N Pat With OS&Y LF8 Backflow Valve is designed for professionals who manage fire protection systems and plumbing networks, offering dependable backflow prevention to maintain water quality and system integrity. Built to withstand demanding conditions, this valve is a critical component for commercial, municipal, and industrial settings where reliable fire safety and potable water protection are essential.

• Durable Construction: Manufactured with an ASTM A536 ductile iron body coated in corrosion-resistant fusion-bonded epoxy, ensuring long-lasting performance in both underground and indoor mechanical room installations.
• Precision Internal Components: Features 300-series stainless steel springs and fasteners delivering corrosion resistance and reliable operation over extended periods.
• Advanced Check Modules: Utilizes reinforced Noryl™ thermoplastic for structural strength, combined with replaceable EPDM elastomer discs to guarantee a tight, reversible seal that effectively stops backflow.
• Regulatory Compliance: UL Listed (UL 1469), FM Approved, ASSE 1015 certified, and compliant with AWWA C510 standards, meeting rigorous fire protection and potable water system requirements.
• Operational Range: Supports maximum working pressure up to 175 PSI (12.1 bar) and temperature ranges from 33°F to 140°F (0.5°C to 60°C), suitable for typical water supply and environmental conditions.
• Installation Flexibility: Compatible with both horizontal and vertical upward flow configurations, featuring 3" NRS flanged ends and an OS&Y LF8 gate valve for precise flow control and simplified maintenance.
• Fire Protection Specific Design: The OS&Y LF8 gate valve component allows fire system operators to isolate the backflow preventer easily, minimizing downtime during inspection or repairs.

This valve prevents contamination of potable water by stopping backflow in fire protection networks, helping maintain system safety and compliance with industry standards. It is ideal for use in commercial buildings, municipal fire mains, and industrial facilities where preventing cross-contamination is crucial. The corrosion-resistant materials and replaceable seals lower maintenance needs and extend service life, reducing overall operational costs. Installation versatility and built-in flow control ensure operational efficiency and quick isolation in emergencies, enhancing system reliability when it matters most.