The Grundfos Unilift AP12.50.11.A1 1x230V 10m is a stainless steel waste water pump, max flow rate 9.5l/sec and max head 16m, 2" threaded connections and 12mm solids handling. The Grundfos Unilift AP range are high quality domestic or light commercial drainage pumps. They can be used for a variety of drainage applications including sumps, washing machines, tank drainage and anything involving slightly dirty water. They can also be used while partially or fully submerged.