Pumps are fundamental machines in the brewing industry. In the brewhouse they transport wort from one vessel to another. In the cellar, they convey green beer, yeast, DE or filtrate, just to name a few. The application conditions that pumps have to deal with are manyfold. In choosing the correct pump for a certain process, however, there are some common but easily avoidable mistakes. This seminar will provide insight into pump systems and pump curves, operating points, cavitation and NPSH, as well as the general functioning of different pump types. The understanding of these mechanisms can not only extend the lifetime of the pump, but also help to reduce operating costs with regard to efficiency figures.