Weil McLain 383-300-411 Replacement Kit

The Weil McLain 383-300-411 Electronic Intermittent Pilot LP Gas Replacement Kit is the verified OEM replacement part for the discontinued 511-330-222 ignition assembly. Engineered specifically for Weil McLain LGB boilers, this LP gas pilot kit provides a complete solution for restoring reliable ignition and flame rectification in high-output atmospheric heating systems. As a critical component of the electronic intermittent pilot system, it eliminates the inefficiencies of standing pilots by only igniting the burner during a call for heat.

Built for the rigors of commercial and industrial hydronic applications, this Weil McLain boiler replacement part ensures precise flame sensing and control interface stability. When servicing LGB Series 1 or 2 boilers, using the 383-300-411 kit ensures that the orifice sizing and electrode positioning meet factory specifications for liquid propane. This kit includes the necessary hardware to maintain safe operating parameters and prevent lockout issues caused by degraded pilot assemblies or inconsistent spark signals.

• Direct OEM Compatibility: Specifically designed as the drop-in replacement for the Weil McLain 511-330-222, ensuring proper alignment with the existing burner manifold.
• Intermittent Pilot Efficiency: Reduces fuel consumption and carbon buildup compared to traditional standing pilot systems.
• Propane Optimized: Pre-configured for LP gas applications with the correct orifice and sensing leads for stable flame detection.
• Heavy-Duty Construction: High-temperature lead insulation and a robust ignition electrode prevent premature failure in high-cycle environments.

Is the 383-300-411 compatible with natural gas LGB boilers?
No, this specific kit is calibrated for liquid propane (LP). For natural gas systems, a different orifice and pilot assembly must be utilized to ensure proper gas flow and pressure.

Does this kit replace the 511-330-222 exactly?
Yes, the 383-300-411 is the direct superseding part number. It mounts to the pilot burner tube using the same footprint as the original 511-330-222 assembly.

What are the signs that my LGB pilot assembly needs replacement?
Contractors typically see pilot outages, inconsistent spark ignition, or frequent control module lockouts due to weak flame signals (microamps) being sent back to the ignition board.

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.