Optimized LP Orifice: Specifically calibrated for liquid propane to maintain consistent pilot flame performance and fuel efficiency

though it should always be operated within its 2-15 psig calibrated range

To ensure safe operation and prevent arcing

mounting bracket

technicians often source a new foam seal or gasket separately to ensure a proper air seal

Lochinvar & A.O. Smith 100187919 Burner Assembly 321894-709 Optimized LP Orifice: Specifically calibratedThe Lochinvar & A. O. Smith 100187919 Burner Assembly is a high specification service component engineered for 16 inch natural gas combustion chambers. This OEM natural gas burner replacement is designed to restore precise thermal output for commercial and residential boilers and water heaters. As a direct replacement for Lochinvar part 100187919 and compatible A. O. Smith water heater burner systems, it features a precision drilled #37 orifice to