Whether you are performing a seasonal pool heater manifold repair or a full heat exchanger swap

though for standard 3-5 year maintenance intervals

The four 5/16-18 socket head bolts provided in the kit should be torqued to 15-21 ft/lbs to ensure a proper seal against the bearing head without damaging the gasket interface

As an authentic ICP replacement part

or repetitive FVIR safety trips

Lochinvar & A.O. Smith 100223755 Burner Assembly 319825-402 Whether you are performing aThe Lochinvar & A. O. Smith 100223755 Burner Assembly is a precision engineered 18 inch final burner assy designed for high recovery commercial water heaters and industrial boiler systems. Featuring a factory calibrated #29 orifice and integrated thermocouple (TC) port, this assembly ensures stoichiometric combustion and stable flame rectification. As a genuine OEM replacement part, it maintains the specific manifold pressure and BTU input required