This 184-113 restrictor tee is specifically required for one-pipe systems where the controller must bleed air to modulate pressure

mixing them will cause hazardous combustion conditions

Thermal Overload Protection: Integrated internal protection prevents burnout during voltage fluctuations or restricted airflow conditions

using this genuine Carrier furnace part ensures a perfect fit with the existing collector box gaskets

including the necessary #57 drill size burner orifices and a heavy-duty regulator spring

McDonnell & Miller 343200 Bellows Assembly 30067439-890 This 184-113 restrictor tee isThe McDonnell & Miller 343200 Bellows Assembly (Model SA63 5) is the critical mechanical linkage used in Series 63 low water cut offs. As a veteran grade replacement component, this assembly mediates the movement between the internal float and the electrical switch, ensuring the heavy duty performance required for commercial and industrial steam boiler safety. This genuine OEM replacement part includes the bellows, the CO 106 cam assembly, and the CO