the A99BB-600 and A99BB-600C are identical components and can be used interchangeably in all technical applications

Universal Compatibility: Fully replaces 12M55 assemblies and 98G8901 models

5-1/4 inch lead length for standard installation

Enhanced System Safety: Critical for preventing the escape of dangerous combustion byproducts into the mechanical room

the integrated occupancy override button enables users to signal the controller for after-hours operation

Weil McLain 510-811-644 Pilot Replacement Kit Els PW 29614 the A99BB-600 and A99BB-600C areThe Weil McLain 510 811 644 Natural Gas Pilot Replacement Kit is a critical OEM service component designed specifically for CG and CGa series boilers. As a veteran technician, you know that ignition failure or a "lazy" pilot flame often stems from a degraded thermocouple or a fouled pilot burner assembly. This comprehensive standing pilot kit includes a heavy duty main burner with an integrated pilot bracket, a precision engineered pilot burner, and a