Weil McLain 381-800-476 Damper

The Weil McLain 381-800-476 is a 6-inch automatic vent damper assembly designed for high-efficiency draft control on residential and commercial gas boilers. This OEM Weil McLain part functions as the direct replacement for the legacy 510-512-346 damper, providing a seamless field upgrade for service technicians. Engineered specifically for compatibility with the Weil McLain PEG-40, CGa-5, and CGa-6 series, this kit features an integrated motor that automatically closes the flue when the burner remains idle, significantly reducing standby heat loss and boosting overall system seasonal efficiency.

Built with robust steel construction, the 381-800-476 vent damper kit includes the required boiler wiring harness and internal motor for precise airflow regulation. As a veteran-tier HVAC replacement part, it ensures the burner does not fire until the damper has reached a fully open position, maintaining strict safety protocols. This assembly is critical for maintaining the pressure and thermal performance specified in your technical manual, preventing down-drafting and optimizing the combustion cycle in single-stage or multi-stage gas configurations.

• Direct Cross-Reference: Replaces the discontinued 510-512-346 without requiring extensive duct modification.
• Compatibility: Optimized for Weil McLain boiler models including PEG, CGa, and EG Series units.
• Energy Efficiency: Integrated motor prevents convective heat loss through the chimney during off-cycles.
• Safety Interlock: Ensures the damper is 100% open before allowing the gas valve to energize.
• Complete Kit: Includes the 6-inch damper housing, drive motor, and necessary electrical connectors.

• Can this replaces the 510-512-346 model? Yes, the 381-800-476 is the official 6-inch direct replacement kit for that older part number.
• Which boilers utilize this 6-inch damper? It is commonly found on larger residential and mid-sized commercial units such as the CGa-5/6 and PEG-40/45 series.
• What does it mean if my boiler won't fire? Often, a failing damper motor prevents the end-switch from closing; replacing the 381-800-476 restores the proper safety sequence.

This item is not eligible for free shipping.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.