Weil McLain 340-004-605 Observation Port 30067439-890 Engineered with a Single Pole

Engineered with a Single Pole Double Throw (SPDT) switch action

you can determine if the valve body is functional

As a core component of the Type 184 series

) disc-style control

Weil McLain 340-004-605 Observation Port 30067439-890 Engineered with a Single PoleThe Weil McLain 340 004 605 Observation Port is a critical boiler component designed for high temperature service and combustion chamber monitoring. This direct replacement observation port assembly allows technicians to perform visual inspections of the flame pattern and burner performance without compromising the integrity of the combustion seal. Built to withstand the thermal stresses found in heavy duty commercial boilers and cast iron boiler