8" Double Check Detector Backflow Preventer Valve Ductile Iron ASTM A536

Safeguard your commercial, industrial, or municipal potable water supplies and fire protection assemblies with the 8" Double Check Detector Backflow Preventer Valve. This dual protection valve stops backflow before it occurs, preventing water contamination across your facility. Built to satisfy containment requirements for cross-connections, it features an integrated detector function to continuously monitor water flow and catch potential backflow issues early. Designed for installation in fire sprinkler systems and mainline water supplies, this unit accommodates both horizontal and vertical upward flow configurations to match your layout.

The grooved butterfly valve design includes a gasketed seal for secure system isolation, allowing trade contractors to perform required maintenance without causing full system downtime. Main body construction utilizes ASTM A536 ductile iron for enhanced strength and impact resistance in demanding job site environments. Internal springs and fasteners feature 300-series stainless steel to extend the operating lifespan of the assembly. Dual check valves utilize high-strength glass-filled Noryl thermoplastic to withstand cyclic pressures, while EPDM elastomer seats provide reversible and replaceable sealing surfaces for consistent shutoff and testing accuracy.

Key Features & Construction

• Ductile Iron Body: Main body crafted from ASTM A536 ductile iron delivers maximum strength and impact resistance in harsh environments.
• Corrosion-Resistant Internals: Internal springs and fasteners use 300-series stainless steel to extend assembly lifespan.
• High-Strength Check Modules: Dual check valves utilize glass-filled Noryl thermoplastic to handle cyclic pressures.
• Reliable Sealing: EPDM elastomer seats provide reversible and replaceable sealing surfaces for precise shutoff and testing.
• Flexible Piping Compatibility: Connects quickly using AWWA C606 grooved piping standards for efficient field installation.
• Operating Parameters: Supports maximum working pressures up to 175 PSI and operates within a temperature range of 33°F to 140°F.

Technical Specifications & Compliance Table

Verify all local Authority Having Jurisdiction (AHJ) requirements regarding backflow prevention assemblies prior to installation. Note that this item is non-refundable and non-cancellable.

Documentation: Download Manufacturer Technical Data & Cut Sheet (PDF)