What is a vacuum-assist nozzle a component of?

The vacuum-assist nozzle is a component of a Stage II vapor recovery system. This system is designed to capture gasoline vapors that are released during the fueling process, particularly when customers fill up their vehicles. The vacuum-assist nozzle helps to create a vacuum that draws the vapors from the vehicle's tank back to the storage tank at the fueling station, minimizing air pollution and preventing harmful vapors from escaping into the atmosphere.

Stage II vapor recovery systems are installed at gasoline dispensing sites and work in conjunction with the dispensing pump to effectively control vapors during the refueling process. The nozzle is equipped to detect the flow of gasoline and activates the vacuum function only during the fueling, ensuring optimal vapor recovery. This is an essential component in reducing environmental impact and adhering to regulations regarding air quality.

In contrast, the other options do not pertain to the vacuum-assist nozzle. Stage I vapor recovery systems deal primarily with vapors released during tank filling at storage facilities rather than during vehicle refueling. An underground storage tank is the physical container in which gasoline is stored, while the dispensing pump refers to the equipment that dispenses fuel to the vehicle but does not include the vapor recovery mechanisms that the nozzle provides.