According to the contract between the Technical Services and Related Studies, methods for reducing water losses in the distribution network of Salafchegan city and providing appropriate implementation solutions will be studied after examining the current situation of Salafchegan city and conducting field surveys of all subscribers, preliminary surveys and preparing the study area, evaluating the general conditions of the production system, collecting and preparing base maps, network and facilities, studies related to the subscriber sector and apparent losses including management and operational errors, human, measuring instruments and unauthorized measurement uses, analyzing the minimum night flow of the network including background leakage, unreported leaks, leakage of valves, tanks and transmission lines, pressure measurement operations, studies related to the water production and distribution system and actual losses, and finally summarizing the results of studies and measurements and completing the water balance form using the IWA method and determining the exact location of the actual losses.