Rugged Construction: NEMA 4 / UL 4X enclosure provides superior protection against dust and moisture for reliable outdoor performance

Always cycle 24V power after changing jumper positions for the new settings to take effect

it provides the necessary reach for complex evaporator coil configurations

it ensures that flue gases remain contained within the venting system

Lochinvar & A.O. Smith 100208653 Flow Switch Els PW 17895 Rugged Construction: NEMA 4 /The Lochinvar & A. O. Smith 100208653 Flow Switch is a critical OEM replacement part engineered for high precision water flow detection in Knight fire tube boilers and high efficiency water heaters. This indoor flow switch features a robust brass bushing and a factory calibrated paddle mechanism designed to provide reliable system feedback, ensuring the burner only fires when adequate circulation is present. Built to NEMA 1 standards, it serves as a