Optimal pressure management is a standard strategy for minimizing water losses in water distribution systems. Minimizing background leakage and pipe bursts is critical to improving the reliability, competency, and overall performance of the network. One of the pressure and leakage management methods in water distribution networks is the use of pressure relief valves and the creation of pressure zones, for the effective operation of these valves, it is very important to determine the appropriate position and their regulatory pressure. In the present study, the effect of pressure zoning method on pressure management and network leakage reduction has been studied using a hydraulic model. For this purpose, with the help of Water GEMS software, the hydraulic model of the water distribution network of Noorabad city was built and the model was calibrated using the information of flow measurement and pressure measurement, then the hydraulic analysis of the model was performed. Based on the results of the pressure zoning, the city's distribution network was divided into 11 pressure zones. Three of the zones were supplied by gravity and eight zones were supplied by installing pressure relief valves using appropriate valve placement. In addition to the existing pressure relief valves, five new pressure relief valves were also proposed to regulate the network pressure. The results showed that by using of zoning, the network pressure reduction level was %17. According to the results of the presented method, it has a proper efficiency on managing the pressure and network events and leakage of the water distribution network.