By attaching to dry vacuum pump exhaust line, ECO-SHOCK ES4A can reduce power consumption of dry vacuum pumps used for frequent pumping down of loading/unloading chambers or that use large amounts of sealed gas. Installation does not incur any degradation of pumping speed, and there is no decrease in performance of dry vacuum pump if ES4A breaks down. This accessory can be used to pump down air, nitrogen, argon, and other stable and safe gases.