Evaluation during operation of non-potable water systems in residential buildings

Abstract There is currently a noticeable increase in independent initiatives for the implementation of non-potable water systems in residential buildings. These initiatives count on little technical support, regulatory guidelines or legislation to guide designers, builders and managers on the appropriate practices of implementation, operation and maintenance of these systems, which can put at risk both the health of users and the success of this technology. Considering that it is essential to meet the needs of users, adapting solutions to use, evaluation during operation (EDO) is a suitable tool for the analysis of the system's current situation. Hence, this study aims to evaluate the performance of buildings' non-potable water systems during their operation in residential buildings, with regard to design, implementation, operation and maintenance. The EDO method was applied in six residential buildings. The results show that lack of technical training, specific technical requirements and laws to guide designers, builders, managers and users contributes to the current scenario, characterized by systems that operate with less than adequate performance to meet the needs of users and ensure their safety.