This document applies to pump 3153.181. The pump is designed mainly for operation in pump sumps, i.e. sewage pumping in pumping stations and/or sewage treatment plants. The pump has a hydraulic power of 7.93 kW and an overall efficiency of 71.4%. The average weight of the pump is 217 kg. The pump is equipped with the patented N-technique. The semi open design of the impeller reduces the risk of clogging and maintains pumping efficiency over longer periods of time.