NIBCO KT403W Fire Protection Check Valve Backflow Preventer

The NIBCO KT403W Fire Protection Check Valve serves as a critical component in commercial and industrial fire suppression networks, designed to automatically regulate water flow direction and prevent backflow. Installed within fire protection piping assemblies, this professional-grade check valve ensures that water travels strictly in a single, proper direction to maintain essential system pressure and purity. By stopping reverse flow, it actively protects the municipal drinking water supply from contamination during emergency activations.

Engineered to satisfy stringent commercial fire safety requirements, this check valve conforms to MSS SP-80 and relevant ASTM standards (including B62, B97, B16, and B140) to guarantee dependable operation. It meets professional code mandates for backflow prevention in fire sprinkler infrastructure, ensuring facilities remain compliant and ready for emergency response.

Key Features & Construction

• Bronze Body Construction: Built from high-quality bronze with a Y-pattern design to withstand rigorous commercial and industrial job site demands.
• Renewable Internal Components: Features a renewable Buna-N seat and disc for long-term operational stability and simplified part replacement.
• Hydraulic Efficiency: Thoughtful Y-pattern architecture minimizes pressure loss across the piping infrastructure to maintain effective fire suppression performance.
• Serviceable Bonnet Design: Incorporates a screw-in bonnet and threaded end connections for straightforward access during routine inspections and maintenance.
• Flexible Installation: Engineered for installation in either horizontal positions or vertically with upward flow to accommodate various system layouts.

Technical Specifications & Compliance Table

Contractors and facility managers must verify all local Authority Having Jurisdiction (AHJ) requirements prior to installation. Consult the Reliable product catalog and list price book and applicable product documentation to confirm exact part numbers, specific system constraints, and engineering requirements.

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