The project concerns the replacement of the existing water supply network within the boundaries of the settlement of Marathos, with polyethylene pipelines (PE100) of high density of a total length of 2.650 m. It aims to improve the hygiene of the networks and ensure the supply of high quality water to consumers. The modernisation of the water supply infrastructure of the settlement, the functional flexibility and control of the network by installing sufficient hydraulic components and the reduction of water losses that are currently observed due to the frequent failures of the network.