Company manufactures elevators for agriculture. When they have installed an elevator, they need to fill the hydraulic system. They were using a hand pump to transfer hydraulic oil from 55 gallon barrels. Substituting the hand pump for a Model 6196 Reversible Drum Vac they were able transfer 10 times faster than a hand pump. This reduced their fill time from 25-30 minutes to a mere 3 minutes.