Kalyoncu, Enes2019-04-302019-04-302019-03-292149-01042149-5262https://hdl.handle.net/11363/1147Abstract- Pumps are widely used in our homes, in buildings, in industrial applications, in agriculture, in water supply and many other applications, even though we are not aware of them. When designing a pump system, it is necessary to compare different solutions to choose the most efficient and efficient system. To find the most intelligent solution, some basic facts must be revealed. As a result of the experimental work done, the loss coefficients are calculated with the aid of the determined pressure deductions taking into consideration the flow direction for the flat pipes, valves and fittings (elbows, nipples, cuffs, record, curve, reduction and TE (transitional elements) It was calculated and presented in tables. In this study, a program was developed to determine the optimum diameters of the pipes that allow the water from the plant to be transported at a certain distance. Galvanized pipes were used in the study. The least-lost diameters and the lowest economic costs were calculated for these pipes. Keywords : Centrifugal pump, diameter calculation, pipe losts, economic pipe diameter.eninfo:eu-repo/semantics/openAccessAttribution-NonCommercial-NoDerivs 3.0 United StatesResearch Subject Categories::TECHNOLOGYArticle513137