McDonnell & Miller 343600 Float and Gasket 30067439-890 Always check the part number

Always check the part number stamped on the side of the original pressure switch

this thermistor probe ensures the control logic receives precise data to maintain setpoint stability and prevent expensive component failure

and electronic thermostats

This model is approximately 1

As the direct replacement for the legacy 5H78034-10 model

McDonnell & Miller 343600 Float and Gasket 30067439-890 Always check the part numberWhen you're dealing with a McDonnell & Miller 343600 Float and Gasket (Model SA64 30), you're handling a critical safety component for steam boiler maintenance. This replacement assembly is specifically engineered for the Series 64 Low Water Cut Off and the high capacity Series 764 controls. In a hydronic heating system, the float must respond instantly to water level fluctuations to prevent dry firing. This kit includes the precision weighted