Stage II Vacuum Assist Systems require no tight seal (bellows) to recover escaping gasoline vapors. Electronically or fluid driven pumps in the dispensing systems actively recover the gasoline vapors at the vehicle fill-pipe. Vacuum Assist Systems have become very popular because your customers don't have to wrestle the cumbersome balance nozzles with bellows. All vacuum assist vapor recovery nozzles supplied by ANS Distributing are UL Listed. Check with your local air quality agency for latest requirement.
