The project concerns the construction of a new external water supply network in the Local Communities (TK) Drepanos, Polymylos, Voskohori, Ag. Charalambous and Tetralofo Municipality of Kozani. The project includes the construction of a water supply network from HDPE pipelines from 12,5 atm to 25 atm of different diameters of 2,955,00 m in length and the construction of the necessary isolation, control, branching, evacuation and airways for the smooth operation of the network. The physical object of the project includes all the necessary electromechanical equipment in the outer networks of the settlements for the best possible control and the installation of new equipment in existing tanks and where necessary.