Always verify your bypass humidifier's model number before ordering

and extending the operational life of the unit

utilizing high-quality internal materials to prevent premature ESR (Equivalent Series Resistance) buildup

Industrial Durability: Built with robust materials to resist the moisture and thermal cycling common in commercial steamers and ovens

Verify the rod is engulfed in the flame and check for proper grounding between the burner and control board

McDonnell & Miller 157RD-1 Replacement Casting 30067439-890 Always verify your bypass humidifier'sThe McDonnell & Miller 157RD 1 Replacement Casting is a critical component for maintaining the integrity of 157RD Series low water cut off and pump controller units. This heavy duty replacement body allows technicians to restore a boiler water level control system without the expense of a full valve replacement. Designed for high pressure steam applications, this casting accommodates the dual switch mechanism used for low water cut off and pump