PWG is a vertical, non-self-priming, multistage centrifugal type pump driven by a standard electric motor. The motor output shaft is directly connected to the pump shaft by means of a coupling. The pressure-resistant body and the flow-through components are fixed with bolt connections between the pump upper part and the lower part where the inlet and outlet are located. Pump inlets and outlets are located at the bottom and on the same axis. These pumps are equipped with an intelligent protective element against dry running, out-of-phase running and overloading.