This final paper presents the conceptual solution of the water supply system of the Veli Lošinj settlement. The location and geographical position of the settlement, the current state of the water supply network and its shortcomings, which are why the conceptual project is being prepared, are described. Furthermore, the types and parts of water supply systems are described in order to better understand the project. The calculation of the water supply system, the hydraulic calculation, the calculation of the pumping station for raising the pressure and the dimensioning of the water reservoir were made. When calculating the pumping station for raising the pressure, the application of the manufacturer Grundfos, which is located on their official website, was used for the selection and dimensioning of the pump. Finally, the drawings of the scheme of the water supply network, the longitudinal section of the main pipeline, the details of the trench, the assembly plan of the junction and the drawings of the water reservoir were made using the AutoCAD 2020 application. The cost estimate determined that the conceptual design would amount to 2 164 054,18 Eur.