Our Pack-Vac® Leak Detectors generate vacuum in one of two ways depending on available utilities. The Venturi Vacuum Generator operates using compressed air. We recommend this set-up if standard dry plant air (60-80 P.S.I., 2-6 C.F.M.) is available. Ideal for abusive production environments. If compressed air is not available, we recommend the Electric Vacuum Pump. Our electric model comes equipped with a quiet and durable vacuum pump, 115 VAC standard (unless otherwise specified).