4" Viking Double Check Detector with OS&Y LF Valve Assembly

The 4" Viking Double Check Detector with OS&Y LF Valve Assembly is a precision-engineered backflow prevention device tailored for fire protection professionals managing commercial and industrial sprinkler systems. It offers dependable contamination control and operational durability to safeguard potable water supplies.

• Robust Construction: Manufactured from high-strength iron alloy, the assembly resists corrosion and withstands the harsh conditions typical of fire protection installations.
• Reliable Internal Components: Features silicone rubber seats and stainless steel springs that deliver tight sealing with minimal pressure loss, ensuring consistent system performance.
• Certified Compliance: UL Listed to standard 312 and FM Approved (Number 1556), meeting NFPA 13, 14, and 25 codes for fire sprinkler backflow prevention.
• Pressure Capacity: Designed for safe operation at pressures up to 175 psi (12.1 bar), adaptable for a broad spectrum of commercial and industrial applications.
• Integrated OS&Y Gate Valve: The 4-inch Outside Screw and Yoke valve facilitates straightforward installation and maintenance while enhancing operational control.
• Application Versatility: Suitable for both retrofit and new system installations where certified and durable backflow prevention is essential.

This Viking Double Check Detector assembly prevents backflow and protects water quality by detecting and stopping potential contamination in fire sprinkler systems. Its durable iron alloy construction reduces maintenance frequency and extends service life, providing facility managers with confidence in long-term system reliability. By meeting rigorous UL, FM, and NFPA standards, it ensures compliance with fire safety regulations without compromising on performance, making it a practical and trusted solution for maintaining the integrity of critical fire protection infrastructure.