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Key Benefits Dual-Size Versatility: Includes both small and medium plates to cover varying footprint sizes when swapping legacy hardware
Manufactured from high-grade steel
the T-4000-3139 is a blank "no-window" model designed for concealed applications where temperature readings and setpoint adjustments are managed by authorized technicians only
ensuring the branch circuit meets NEC requirements for HVAC electric heater kits
Lochinvar & A.O. Smith 100208391 Pressure Switch 322057-301 Key Benefits Dual-Size Versatility: IncludesThe Lochinvar & A. O. Smith 100208391 Pressure Switch is a mission critical safety component designed for precise pressure monitoring within high efficiency boilers and water heaters. Engineered to meet rigorous OEM specifications, this 0. 21" W. C. air pressure switch functions as a blower prover, ensuring the combustion blower is generating sufficient airflow before allowing the ignition sequence to proceed. By supervising the differential pressure
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