Natural object of the segmented phasing operation is the replacement of the internal water supply network of the city of Kastoria, capital of the homonymous municipality of the Regional Unit of Kastoria in the Region of Western MacedoniaThe physical object includes the construction works for the replacement of all the pipes of the internal water supply network of the city of Kastoria, the connection of all the houses with the new piping network and the addition of two new water supply tanks next to the existing ones.