utilizing this OEM furnace pressure switch ensures the system stays within factory specifications for airflow and combustion safety

this component adheres to strict factory tolerances

ensuring zero-mod install for contractors

When performing a pilot burner replacement

this assembly includes interchangeable orifices (BCR-18 for natural gas

McDonnell & Miller 250-3/4-60 Valve 30067439-890 utilizing this OEM furnace pressureThe McDonnell & Miller 250 3 4 60 is a high capacity 3 4" NPT pressure relief valve engineered specifically for hydronic heating systems and large storage tanks. Designed to provide critical over pressure protection, this ASME Section IV certified valve is factory set at 60 PSI and features an impressive thermal discharge capacity of 1,252,000 BTU hr. As a veteran grade boiler safety relief valve, it utilizes a durable bronze body and seat combined