Lochinvar & A.O. Smith 100338899 Gasket 320074-702 As a Normally Closed (NC)

As a Normally Closed (NC) switch with Single Pole Single Throw (SPST) logic

and G8 series units

Vibration Dampening: Precision manufacturing helps minimize harmonic resonance and noise during the blower motor duty cycle

Designed for backwards compatibility

Designed for high-performance York chiller troubleshooting and long-term industrial reliability

Lochinvar & A.O. Smith 100338899 Gasket 320074-702 As a Normally Closed (NC)The Lochinvar & A. O. Smith 100338899 Gasket is a critical OEM replacement part engineered for high performance Low NOx heating systems. Specifically designed for use as a Spark Rod BTL Gasket, this component ensures a high integrity seal between the spark igniter assembly and the burner tube locator (BTL). As a veteran technician knows, maintaining a precise seal in the combustion chamber is vital for preventing gas leaks and ensuring consistent