Roughness in water supply pipes is an important parameter in hydraulic sizing and one that changes significantly over time due to friction with the fluid passing through it. Hydraulic design requires the designer to know the pressure drop of the pipe, which depends on the roughness. Incorrect pressure drop estimates can occur due to inaccurate roughness values. Calibrating and modelling water supply systems is generally a laborious process, often using trial and error methods, but there are currently optimization programs and software that make this work easier. This article consists of the creation of a digital twin applied to a pilot water supply system for estimating pipe roughness. The digital twin was modeled based on the characteristics of the electric motor, pump and frequency inverter, valve and hydraulic connection components. To achieve the objective of this work, twenty-four possible scenarios were carried out with speed and pressure control of the system. The results obtained show a maximum tracking error of 5%, demonstrating the effectiveness of the methodology and its applicability in larger scenarios.