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

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

and mold spores as small as 1 micron without causing excessive static pressure drop

ensuring zero-clearance fitment during refurbishments

Lochinvar & A.O. Smith 100223755 Burner Assembly 319825-402 The four 5/16-18 socket headThe 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