The compressed air-powered Dual-Force Vac is a dual mode (fill and empty) drum pump offering newly patented design features. An internal air amplifier generates a powerful operation and faster flow rates, filling or emptying a 55-gallon drum in less than two minutes. The versatile pump is said to be ideal for liquid transfers, floor spills, handling of sludge and coolant in sumps and open pits, hydraulic oil, tramp oil, solvents, waste water and much more. Its durable construction is designed to be resistant to most non-volatile, nonflammable liquids and, with no moving parts, the unit is virtually maintenance-free. A simple quarter-turn knob switches the unit to fill or empty modes, and its air-powered operation eliminates motor burnout concerns and potential shock hazards.