McDonnell & Miller 310488 Switch Assembly R-410A Chemical Resistance: Solid brass build

Chemical Resistance: Solid brass build is suitable for a wide range of water conditions in industrial and agricultural settings

Replace your compromised or scaled-out water heater elements with the Bradford White 415-48642-00

It is frequently used for oil return lines and pressure sensor ports

and Luxaire air handlers to restore factory-specified static pressure

Compare your reading against the Lochinvar sensor resistance chart for the current ambient temperature

McDonnell & Miller 310488 Switch Assembly R-410A Chemical Resistance: Solid brass buildThe McDonnell & Miller 310488 is a field replaceable SWA 42S Snap Switch Assembly engineered specifically for Series 42S low water cut off and pump controllers. This single pole, single throw (SPST) mechanism provides precise automatic reset functionality, ensuring consistent boiler feed pump control and high limit safety across residential, commercial, and industrial steam applications. Built with a robust housing and high quality internal contacts,