replaces part numbers 15M4501

preventing unintended downstream flow

uniform flame for maximum heat transfer

confirm if a "Z" or "X" charge is required for your specific evaporator temperature range

Lochinvar & A.O. Smith 100112664 Burner Assembly 318423-701 replaces part numbers 15M4501The Lochinvar & A. O. Smith 100112664 Burner Assembly is a precise OEM replacement engineered for high recovery natural gas water heaters and commercial heating systems. This 20 inch burner assembly features a factory calibrated #32 orifice, ensuring the stoichiometric air fuel ratio required for efficient combustion and minimal carbon monoxide production. Specifically designed for compatibility with series like the PVN5040 and G650S40N PV ES2, this