and large-scale ventilation systems

making it a staple for commercial boiler feeds and industrial heating loops

using a standard band or thru-bolt configuration

Key Benefits for Technicians OEM Compatibility: Exact replacement for LH33EP040 and LH33EP040A

this kit ensures the manifold pressure is correctly regulated for propane applications

Lochinvar & A.O. Smith 100111317 Pressure Switch 326010-701 and large-scale ventilation systemsThe 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