The 20" Deringer Low Head Loss Double Check Valve Assembly is a specialized backflow prevention device designed for fire protection systems in commercial, industrial, and municipal settings. It ensures reliable water flow with minimal pressure loss, making it essential for professionals aiming to maintain sprinkler system efficiency and compliance.

• Heavy-Duty Iron Body: Constructed from durable iron with a corrosion-resistant coating to withstand mechanical and environmental stress common in fire protection installations.
• High-Quality Internal Components: Features stainless steel springs and fasteners for rust resistance, thermoplastic check modules, and reversible, replaceable EPDM elastomer seats to maintain long-lasting sealing performance.
• Compliance and Certification: UL Listed to UL 1469, FM Approved, and compliant with ASSE 1015, as well as NFPA 13 and 25 codes, ensuring safety and adherence to fire service standards.
• Operational Versatility: Supports up to 175 PSI working pressure and accommodates ANSI B16.1 flanged and AWWA C606 grooved connections, providing flexibility for varied piping configurations.
• Low Head Loss Design: Minimizes pressure drop across the valve to preserve critical sprinkler head pressure, supporting effective fire suppression during emergencies.
• Installation Flexibility: Suitable for both horizontal and vertical (upward flow) installations, allowing seamless integration into diverse mechanical layouts.
• Maintenance-Friendly Features: Equipped with pre-drilled test cocks for easy annual inspections and differential pressure testing, helping extend the valve’s service life.
• Dual Independent Check Barriers: Effectively prevents back-siphonage and contamination, maintaining safe and reliable water supply crucial for fire protection systems.

This valve assembly is engineered to optimize fire sprinkler performance by maintaining steady, high-volume water flow with low hydraulic resistance. Its robust construction and compliance with stringent safety standards provide professionals managing large-scale fire protection systems confidence in both system reliability and regulatory adherence. With user-friendly maintenance features and versatile installation options, it addresses key challenges in safeguarding critical infrastructure against fire hazards.