McDonnell & Miller 64-B Low Water Cut Off 30067439-890 serving as the direct replacement

serving as the direct replacement for Y66T13-0

or immediately if the pressure drop exceeds 10 mbar across the unit

For ultra-pure water or special chemicals

Ensure all electrical power and gas supplies are disconnected before accessing the cabinet to replace the existing control and bracket assembly

this linkage kit eliminates the need for full valve replacement

McDonnell & Miller 64-B Low Water Cut Off 30067439-890 serving as the direct replacementThe 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