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also identified in technical catalogs as the Watts KSTEM-12
Critical Safety Compliance: Engineered to meet strict UL and manufacturer specifications for over-temperature protection
Engineered specifically for Sensus 243-12-1 and 243-12-2 service regulators
the 100-0017-001 is required if you are monitoring a second circuit (DS models) or if the primary sensor has been compromised
Lennox 52M40 Pressure Switch Els PW 17895 also identified in technical catalogsAs a field tested Lennox 52M40 Pressure Switch, this genuine OEM component is a critical safety interface for residential and commercial gas furnaces. Engineered for precise pneumatic monitoring, this SPST furnace pressure switch features a single pole single throw configuration designed to verify inducer motor performance. The integrated 1 4" barb connection allows for a secure, airtight fit with standard pressure tubing, ensuring the system
