Lochinvar & A.O. Smith 100278117 Gasket 321894-709 Multi-Speed Flexibility: Features 3-speed taps

Multi-Speed Flexibility: Features 3-speed taps for precise airflow balancing

use with long flare nuts is recommended to ensure long-term connection integrity

including widely installed Lennox G24

which can be left disconnected if the boiler or pump logic does not require it

Lochinvar & A.O. Smith 100278117 Gasket 321894-709 Multi-Speed Flexibility: Features 3-speed tapsProfessional grade maintenance requires precision components that ensure a gas tight seal and reliable combustion performance. The Lochinvar & A. O. Smith 100278117 Gasket Set is a comprehensive OEM replacement part specifically engineered for high efficiency condensing boilers and water heaters. As a veteran technician, you know that reuse of flat gaskets or fiber seals during a heat exchanger service leads to nuisance lockouts and dangerous flue gas