Does this assembly include the primary and secondary headers

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

Always verify your bypass humidifier's model number before ordering

Symptoms often mirror a low refrigerant charge

McDonnell & Miller 157RD-1 Replacement Casting 30067439-890 Does this assembly include theThe 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