This part is the primary air metering valve for Lochinvar FBL1251

the SWT4155 is specifically a low pressure switch designed for the suction side to monitor for charge loss or airflow issues

this left-side collar offers a drop-in HVAC replacement part solution that maintains factory specifications for exhaust venting

Universal Compatibility: Directly replaces the KMC M573-3108

it can be adapted for other surface-mounted pneumatic thermostats featuring similar dimensions (approximately 4-13/16" L x 3-1/2" W)

AERCO Boiler and Water Heater 63501010 Fan Cable 320788-703 This part is the primaryThe AERCO Boiler and Water Heater 63501010 Fan Cable is a critical OEM replacement part engineered specifically for high efficiency AERCO Boiler and Water Heater boiler systems and commercial water heaters. This industrial electrical harness ensures a stable and secure connection between the internal control board and the combustion blower assembly, facilitating precise modulating fan control. Fabricated with high grade insulation, the cable is