Weil McLain 340-004-605 Observation Port 30067439-890 you can determine if the

you can determine if the valve body is functional

As a core component of the Type 184 series

smooth opening and closing cycle to effectively prevent water hammer in the loop

or visible physical symptoms such as a "domed" or bulging top on the aluminum canister

Weil McLain 340-004-605 Observation Port 30067439-890 you can determine if theThe 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