Weil McLain 510-811-458 Kit

The Weil McLain 510-811-458 is a critical intermittent pilot ignition conversion kit designed to transition aging boilers from obsolete Honeywell S86H or White-Rodgers systems to modern United Technology (UCS) ignition control. Engineered specifically for Weil McLain EG and CG series boilers (sizes 30 through 55), this OEM gas boiler repair kit provides a direct solution for technicians addressing inconsistent ignition or failed pilot burner assemblies in natural gas applications. This comprehensive kit includes a 1/2-inch NPT gas valve, a high-performance pilot assembly equipped with an integrated sparker and sensor, and a dedicated wiring harness to ensure code-compliant electrical integration. By standardizing the ignition sequence with authentic Weil McLain replacement parts, contractors can restore system reliability and precise fuel regulation. This kit is strictly for natural gas boilers and is essential for maintaining the operational integrity of residential hydronic heating systems while ensuring compatibility with original manufacturer specifications.

• Broad Compatibility: Engineered for Weil McLain EG, CG, and CGM boiler models ranging from size 30 to 55.
• System Modernization: Replaces obsolete Honeywell and Johnson Control ignition systems with current UCS technology.
• Complete Assembly: Includes a 24V combination gas valve, pilot burner, and control module for a full system overhaul.
• Reliable Spark Ignition: The integrated sparker and sensor ensure consistent pilot lighting and flame rectification.
• OEM Precision: Guaranteed fitment and performance when installed according to factory wiring and installation instructions.

Is this kit compatible with propane (LP) systems?
No, the 510-811-458 kit is specifically designed for Natural Gas applications only. Conversion for propane requires different orifice sizing and pressure regulation.

Can I use this for smaller CG-25 units?
Yes, this kit is the designated replacement for CG 25-6 natural gas units transitioning to United Technology controls.

Does this replace the older 3-wire pilot systems?
This kit replaces many older pilot configurations by upgrading the entire control logic to a United Technology Control Module and a modern spark-to-pilot 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.