The Grundfos Unilift AP50B.50.11.3V 3x400V 10m is a stainless steel vortex waste water pump, max flow rate 8l/sec and max head 14m, 2" threaded connections and 50mm solids handling. The Grundfos Unilift APB range are vortex pumps designed for highly effective solids handling. The pumps can be used effectively with domestic sewage and waste water.