McDonnell & Miller

This head gasket is for technicians and maintenance teams servicing compatible 150 Series equipment. It is used with a raised face flange head to provide the required gasket interface during service...

This cartridge and strainer kit is for heating-system maintenance personnel working with compatible low water cut-off equipment. It provides the specified cartridge and strainer components for use...

This stainless steel paddle kit is a replacement component for HVAC professionals and facility maintenance teams servicing compatible Series FS4-3 water flow switches. It provides the paddle...

This general-purpose water flow switch is for HVAC technicians and facility maintenance teams that need a switch for water-flow applications, including installations exposed to environmental...

This 1-inch NPT flow switch is for HVAC and equipment-control professionals who need to start or stop electrically operated devices in response to water flow. It can be used to control equipment such...

This general-purpose water flow switch helps HVAC and facility maintenance professionals start or stop electrically operated equipment in response to water flow. It can be used to control connected...