Description
The Weil McLain 510-811-644 is a factory-engineered Natural Gas Pilot Replacement Kit designed to restore reliable ignition and combustion performance to compatible Weil McLain heating systems. This all-in-one kit eliminates guesswork by bundling every critical pilot assembly component into a single, OEM-matched package — ensuring proper fit, function, and long-term dependability.
Kit Contents
- Main Burner with Pilot Bracket — provides the primary combustion surface and securely positions the pilot assembly for accurate flame alignment
- Pilot Burner — delivers a consistent, stable pilot flame to reliably ignite the main burner on demand
- Thermocouple — generates a millivolt signal to prove pilot flame presence and keep the gas valve safely open during normal operation
Key Features & Benefits
- OEM Weil McLain replacement kit — engineered to exact factory specifications for guaranteed compatibility
- Natural gas configuration — ready for direct installation in natural gas-fired applications
- Complete assembly kit — all components included to minimize downtime and eliminate multiple part orders
- Pilot bracket included — ensures precise pilot burner positioning relative to the main burner for optimal ignition performance
- Thermocouple safety sensing — provides proven flame supervision to protect against unlit gas flow
- Ideal for service technicians and boiler maintenance professionals seeking a reliable, single-source solution
Application
This replacement kit is intended for use in compatible Weil McLain natural gas-fired boilers and heating appliances that utilize a standing pilot ignition system. Always verify compatibility with the specific boiler model before installation. Refer to the Weil McLain installation and service documentation for proper procedures.









