Dewatering couplings are manufactured from galvanized steel with a rubber gasket.. The connection could be made by a lever which is lockable with one hand. Pressure and suction are always guaranteed, even if when the couplings are dirty. Dewatering couplings have a long life by use of high quality steel. The couplings are available from 2 “to 8”. The Dewatering couplings are very widely used in the dewatering and civil engineering industry, but also in the agriculture and industrial sectors.