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Synthetic reinforcement significantly reduces belt stretch
used to prevent overheating
Precise Calibration: The #42 drill size provides the exact flow rate required for LP gas configurations in Johnson Controls HVAC parts
Clear Calibration: Provided with high-visibility 60-90 degree inserts to ensure setpoint accuracy for facility operators
Lennox 57M67 Pressure Switch Synthetic reinforcement significantly reduces beltThe Lennox 57M67 Pressure Switch is a high precision OEM component engineered for critical safety monitoring in gas fired furnaces and HVAC systems. As a veteran technician knows, maintaining the correct pressure threshold is vital for inducer motor verification and combustion safety. This SPST pressure switch is factory calibrated to actuate at 1. 71" WC (water column), ensuring that the exhaust blower is moving sufficient air before the ignition