A comprehensive analysis of the water distribution network can be effective in evaluating the existing conditions. this method makes possible appropriate decisions in the design of the hydraulic model of Non-Revenue Water (NRW). It also informs the calculation of physical losses and the implementation of consumption management. Access to the data related to the maintenance of the water system can be useful in the correct analysis of the conditions. The data of water flow entering the District Metered Areas or DMA's in the water distribution network can be measured by regional meters. Choosing the place to install regional meters requires network analysis to determine the range of flow and pressure changes. In this work, along with pressure measurement and calibrating the hydraulic model, a computer map of pressure curves was prepared. After creating the isolation area, installing the meter in DMA showed that physical losses are under the direct influence of fluid working pressure changes. In the regression analysis, the fluid working pressure in the water distribution network as a dependent variable of changes in the outflow water of the reservoir (incoming water flow to the DMA) had a P-value of 0.989.