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Broad Compatibility: UL-listed for modern refrigerants including R1234ze(E) and R513A
fitting wide-ranging Nordyne and Intertherm gas furnace models
reducing system downtime and labor costs for technicians
or immediately if the pressure drop exceeds 10 mbar across the unit
Optimized Steam Generation: Maintains the evaporation efficiency required for precise humidity control in commercial environments
McDonnell & Miller 64-B Low Water Cut Off 30067439-890 Broad Compatibility: UL-listed for modernThe McDonnell & Miller 64 B Low Water Cut Off (Part Number 143800) is a heavy duty mechanical safety control engineered for both hot water and steam boilers. As a veteran grade float type LWCO, this unit provides essential protection against dry firing by interrupting the burner circuit if the water level drops below a safe threshold. It features a robust 1" NPT connection and is rated for a maximum boiler pressure of 50 PSI. The integration of dual