In view of the need to completely remodel the hydraulic networks in the Cais do Sodré metro station, we carried out the execution projects for the water, fire service and drainage networks in a metro station, as well as the measurements/estimates of the work to be carried out. An inspection and test of the water and drainage networks was carried out, followed by a report verifying the condition of the existing networks. After analyzing the conclusions of the inspection, the execution project was drawn up, comprising the water supply networks, the fire service network and the rainwater and wastewater drainage network.