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36" WC Trip Point: Factory-calibrated for accurate combustion airflow monitoring to prevent unsafe firing conditions
this is a specific OEM part
It establishes a 24V control signal when the draft inducer motor successfully generates sufficient negative pressure
Its high-grade elastomer construction resists hardening and cracking
McDonnell & Miller 339800 Arm Assembly Els PW 17895 36" WC Trip Point: Factory-calibratedThe McDonnell & Miller 339800 is a precision engineered SA25 5 Arm Assembly specifically designed for the 25A Series make up water feeders. As a veteran technician knows, maintaining the mechanical linkage between the float and the valve assembly is critical for ensuring accurate water level regulation in residential and commercial boiler systems. This replacement float arm serves as a direct OEM component for Series 25 A controls, restoring the
