Before a wall burner is pulled for inspection, what must be done?

• A. The electrical supply must be disconnected
• B. The fuel gas valve must be shut
• C. The water supply must be closed
• D. The air supply must be cutoff

Answer: (B)

Isolating the fuel supply is the key safety step when pulling a gas wall burner for inspection. Closing the fuel gas valve stops all gas flow into the burner, preventing the danger of gas leaking and potentially igniting during service. Other lines aren’t the immediate hazard here: disconnecting electrical power doesn’t stop the gas, water supply isn’t involved in this procedure, and cutting the air supply would hinder combustion rather than safely preparing the unit for inspection. Closing the fuel valve leaves the system without fuel, making the inspection safer.