Magnatrol Solenoid Valves G131S44SC ACTS Valve THPU32HP7Y Smith 100208306 Indicator Light is Smith 100208306 Indicator Light is a critical diagnostic component for maintaining the operational integrity of high efficiency boilers and water heaters verify that the pressure switch tubing is clear of moisture or debris and that the flue vent and secondary heat exchanger are not obstructed before replacing the component Universal Compatibility: Serves as the primary replacement solenoid valve for the legacy 131S44 series in steam service This valve must be installed in a horizontal run with the solenoid enclosure in the vertical position for optimal seat alignment