A water aspirator pump creates vacuum by passing water through a Venturi, so the pump runs oil-free. Labs use this vacuum for filtration, distillation and solvent removal. Flow rate comes in two classes, with reservoirs sized to match. The smaller class runs at 60 L/min with a 15 L reservoir. The larger class runs at 80 L/min with a 50 L reservoir. Maximum vacuum is 0.098 MPa, and each tap draws 10 L/min. Smaller units offer two vacuum connections, and larger units offer five. A built-in gauge shows the vacuum level during use. Benchtop versions sit on a bench, and mobile versions roll on casters between stations. Chemical-resistant design suits routine solvent work.