Lochinvar & A.O. Smith 100111317 Pressure Switch 319848-301 the included packing cartridge and

the included packing cartridge and repack kit are specifically designed to reseal the valve stem and stop external fluid loss

making it an ideal choice for commercial and industrial combustion systems

indicates the seal has failed

Look for a blown top membrane

optimized for air conditioning and general cooling applications

Lochinvar & A.O. Smith 100111317 Pressure Switch 319848-301 the included packing cartridge andThe Lochinvar & A. O. Smith 100111317 Pressure Switch is a critical OEM safety component engineered for precise airflow verification in high efficiency water heaters and boilers. This normally open air pressure switch is calibrated to a fixed set point of 0. 20" WC (Water Column), ensuring the combustion blower is generating sufficient negative pressure before the ignition sequence initiates. As a genuine 100111317 replacement part, it provides the