ABSTRACT
Most of the existing water supply distribution systems were developed to operate over a determined planning period. Over time, however, failures caused by the deterioration of pipes and hydraulic components become frequent in such systems. In addition, the increasing demand for water caused by the urbanization has lead to problems such as insufficient discharges to meet demand and lowpressure levels in the network. Thus, the decision process of rehabilitation and replacement of existing components to meet current and future demands constitutes a subject of great interest.
