HydraMaster temperature bypass solenoid.

Float valve assembly.

2" x 2" adapter, slip fitting to male pipe thread.

Barb 2 x 2FPT with 90 degree elbow

The MAC vacuum control solenoids work in conjunction with the temperature controller to operate the exhaust diverter actuator. When not functioning properly the actuator won't open and the unit will often under perform in heating. There are two solenoids employed one as a primary and one as a secondary, it's recommended to change both at the same time.