What is an example of a vapor recovery device?

A vapor recovery nozzle is a specific device designed to capture and recover vapors that are released during the fueling process, notably at gas stations. When fuel is dispensed, vapors can escape into the atmosphere, which can contribute to air pollution and pose safety hazards. The vapor recovery nozzle allows these vapors to be drawn back into the storage tank rather than being released, thus preventing environmental contamination and improving safety.

In contrast, devices like pressure gauges, fuel filler pipes, and tank venting valves serve different functions. A pressure gauge monitors pressure levels but does not capture vapors; a fuel filler pipe allows fuel to flow into the tank but does not have vapor recovery capabilities; and a tank venting valve is designed to allow the release of pressure/air but does not specifically recover fuel vapors. Therefore, the vapor recovery nozzle uniquely fulfills the function of vapor recovery, making it the correct answer in this context.