The pipe that connects an approved fuel-fired appliance to a vent is called what?

The pipe that connects an approved fuel-fired appliance to a vent is called what?

• A. Furnace pipe
• B. Vent connector
• C. Flue pipe
• D. Coupling

Answer: (B)

The connection between a fuel-fired appliance and the building’s vent is known as the vent connector. It’s the pipe that attaches directly to the appliance’s exhaust outlet and carries the combustion gases from the appliance into the vent or chimney. This term distinguishes the section that links the appliance from the rest of the venting system. Why this fits best: it describes the function of the pipe precisely—connecting the appliance to the venting system. The other terms aren’t the right fit for that specific role: a furnace pipe isn’t a standard designation for the connection to a vent; a flue pipe generally refers to the main exhaust passage within the venting system, often the portion that continues upward toward the chimney; and a coupling is merely a fitting, not the entire run of pipe.

The connection between a fuel-fired appliance and the building’s vent is known as the vent connector. It’s the pipe that attaches directly to the appliance’s exhaust outlet and carries the combustion gases from the appliance into the vent or chimney. This term distinguishes the section that links the appliance from the rest of the venting system.

Why this fits best: it describes the function of the pipe precisely—connecting the appliance to the venting system. The other terms aren’t the right fit for that specific role: a furnace pipe isn’t a standard designation for the connection to a vent; a flue pipe generally refers to the main exhaust passage within the venting system, often the portion that continues upward toward the chimney; and a coupling is merely a fitting, not the entire run of pipe.