Lochinvar & A.O. Smith 100288908 Gasket 321702-401 Always verify the model and

Always verify the model and serial plate information against Modine literature before installation

Rugged copper probe construction ensures rapid thermal response and long-term stability in hydronic or air systems

this direct-drop-in sensor is essential for restoring factory-spec performance in water-loop temperature regulation

Built with a rugged cast iron body and stainless steel internals

Lochinvar & A.O. Smith 100288908 Gasket 321702-401 Always verify the model andThe Lochinvar & A. O. Smith 100288908 Gasket is a critical heat exchanger gasket set designed for commercial boiler maintenance and specialized pool heating applications. Featuring a 15 3 4" diameter, this high performance hex burner gasket is engineered to ensure a gas tight seal, preventing thermal bypass and maintaining peak combustion efficiency. This OEM replacement gasket kit is specifically compatible with Lochinvar AQUAS Low NOx indoor