Lochinvar & A.O. Smith 100233643 Gasket 321042-401 Direct replacement with the 05-02371-01

Direct replacement with the 05-02371-01 part number guarantees dimensional accuracy and material compatibility with industrial steam service requirements

but never lower

Gaskets are sold separately

While a faulty coil in the gas valve is a common cause

this housing ensures optimal air movement and protects internal components from thermal stress and debris accumulation

Lochinvar & A.O. Smith 100233643 Gasket 321042-401 Direct replacement with the 05-02371-01The Lochinvar & A. O. Smith 100233643 Gasket is a critical OEM replacement part engineered for high output condensing boilers and water heaters. Specifically designed for the Crest FB2500 and FBN2500 models (prior to serial number D14), this burner assembly gasket ensures a high integrity seal between the burner and the heat exchanger. For technicians performing boiler maintenance or a complete burner assembly overhaul, replacing this component is