Smith 100111256 Flame Control Board is a critical OEM replacement component designed for high-efficiency gas-fired boilers and water heaters

This 3-blade assembly features a 30-degree pitch and a 1/2-inch bore diameter

It can be ordered as a standalone valve body or as a complete factory-mounted assembly

ensuring that contaminants are trapped before they can reach the high-precision screw compressor internals

The 17-4 PH stainless steel wetted parts provide excellent media compatibility

Lennox 18L11 Conversion Kit 321142-301 Smith 100111256 Flame Control BoardThe Lennox 18L11 LP Conversion Kit (617168 01) is the essential field service solution for transitioning Lennox compact unit heaters from natural gas to liquid propane. This OEM Lennox conversion kit is engineered specifically for LF25, LS25, and UHRS series units ranging from 30k to 105k BTUs. As a direct replacement for Lennox 45L85 and 617168 01, it ensures precise manifold pressure regulation when paired with White Rodgers 36G series gas valves.