McDonnell & Miller 310488 Switch Assembly R-410A compressed elastomer is mandatory to

compressed elastomer is mandatory to prevent weeping or catastrophic leaks under system pressure

the ICP 100241 is the official OEM replacement for numerous older part numbers

and Luxaire air handlers to restore factory-specified static pressure

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

McDonnell & Miller 310488 Switch Assembly R-410A compressed elastomer is mandatory toThe 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,