This study conducts a comprehensive exploration of the nuanced influence of central restriction height on average static pressure in dump diffusers through a rigorous numerical investigation. The research meticulously focuses on critical geometric parameters, specifically emphasizing the height of the central restricted portion, to unravel their profound impact on diffuser performance. Employing a non-dimensionalized geometry and incorporating Newtonian principles and incompressible fluid dynamics, the analysis provides a thorough assessment of pressure recovery. A static pressure variation curve is intricately charted along the x-axis of the geometry across a range of Reynolds numbers from 50 to 1000. Additionally, the study delves into variations in streamline contours, offering a holistic understanding of flow behavior. The pivotal findings reveal that the diffuser geometry characterized by a non-dimensional height (hd1 = 0.352775) of the central restriction outperforms others in terms of static pressure, contributing significantly to the optimization of dump diffusers for industrial applications. These results deepen our comprehension of the intricate interplay between geometric configurations and static pressure distribution, thereby paving the way for advanced diffuser design methodologies.