The Grundfos Unilift AP50B.50.11.A1V 1x230V 5m SCH 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.