Trimpac Model B-4 Single Interlock Preaction System

The Trimpac Model B-4 Single Interlock Preaction System is a precision-engineered fire protection valve designed for commercial, industrial, and institutional facilities where preventing accidental water discharge is essential. Installed as part of specialized preaction fire suppression assemblies, it protects sensitive areas like data centers, museums, and archives by preventing unwarranted water release.

This system satisfies the rigorous safety and design mandates governed by NFPA 13 and NFPA 72 standards, ensuring full compliance for commercial inspections and life safety deployments.

Key Features & Construction

• Durable Construction: Manufactured from rugged ductile iron to ensure long-term resilience under demanding commercial fire protection conditions.
• Single Interlock Design: Requires both a fire detection signal and manual or system activation before water is released, drastically minimizing false alarms and water damage.
• Versatile Integration: Compatible with wet pipe, dry pipe, and preaction sprinkler setups to connect seamlessly with diverse fire detection devices.
• Precision Asset Protection: Engineered to release water only when absolutely necessary, safeguarding high-value infrastructure.

Technical Specifications & Compliance Table

Contractors and facility managers must verify all local Authority Having Jurisdiction (AHJ) requirements and thoroughly review manufacturer technical cut sheets prior to commencing installation.

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