Does this assembly include the primary and secondary headers

Chemical Resistance: Resilient against pool water treatments

this 120V component provides rapid heat-up and stable electrical resistance

Is the 8210G2HW compatible with steam applications

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