6" Vent Damper Assembly

The Weil-McLain 381-800-476 Automatic Vent Damper Assembly is an OEM-engineered flue control component designed for use with Weil-McLain gas-fired boiler models CGa-5/6, CG-5/6, CGx-5/6, and EG Series. This 6-inch vent damper assembly regulates flue gas discharge by automatically opening and closing during boiler operation to optimize combustion efficiency and reduce standby heat loss. The assembly includes a factory-installed wiring harness for direct electrical integration with compatible control systems.

Details

• Model Number: 381-800-476
• Manufacturer: Weil-McLain
• Product Type: Automatic Vent Damper Assembly
• Part Number: 17119
• Connection Diameter: 6 inch
• Included Components: Vent damper with prewired electrical harness
• Application: Automatic flue gas control for gas-fired boiler systems
• Compatible Models: CGa-5/6, CG-5/6, CGx-5/6, and EG Series Boilers
• Control Type: Motor-actuated damper with integrated position feedback
• Material: Galvanized steel body with precision-sealed damper plate
• Function: Automatically opens during burner operation and closes during standby to prevent heat loss
• Electrical Interface: Pre-terminated harness compatible with Weil-McLain boiler control systems
• Compliance: Factory-tested OEM safety component; meets ANSI Z21.66 standards for automatic vent dampers

Professional Specifications

The Weil-McLain 6-inch Automatic Vent Damper Assembly is constructed from corrosion-resistant galvanized steel with a precision-fit damper blade and motorized actuator for consistent, low-leakage performance. The integrated motor assembly interfaces directly with the boiler’s control board through a prewired harness, simplifying field installation and ensuring proper sequencing with burner ignition. The damper remains closed when the burner is inactive, minimizing flue losses and improving overall combustion efficiency. Each unit is factory-calibrated and tested to verify proper positioning, response time, and electrical continuity for compliance with safety and performance standards in gas heating systems.

Summary

The Weil-McLain 381-800-476 Automatic Vent Damper Assembly (6 inch) provides a factory-approved, code-compliant flue control solution for compatible Weil-McLain gas boilers. Its precision motorized design, durable construction, and integrated wiring harness ensure dependable performance, energy efficiency, and simplified installation in professional boiler service applications.