The Rheinstrom centrifugal pump K 10 is one of the strongest pumps on the market and is equipped with a vortex wheel made of bronze. The big suction and pressure connections cause a high degree of safety against clogging and big amounts of sewage are transported out of the sewage tank. The parts which come in contact with the conveying means are made of bronze or stainless steel. The motor is sealed with a self-adjusting axial face seal. The pump is not self-priming and therefore it must be installed either at the lowest part of the tank or lower than the tank itself.