The Xylem-McDonnell & Miller 323300 92-68 Head Gasket is a precision-engineered sealing component designed for use in McDonnell & Miller boiler controls and related HVAC equipment. It provides a secure, leak-proof seal between mating surfaces, preventing fluid or pressure loss during operation. https://www.partshnc.com/323300-xylem-mcdonnell-miller-92-68-head-gasket