There are many factor affect pump operation and working which include their physical arrangement, speed, suction head, exhaust head, and properties of liquid etc. lowered capacity, vibration, reduced efficiency, and cavitations could cause serious trouble like Suction Head available, Excessive suction lift, shallow inlet submergence. Category of connection and arrangement are the suction conditions. The conventional suction geometry is not efficient for higher capacity of pump and thus reduced discharge on the delivery side. Intake manifold is being designed for this work. The previous and modified configurations are studied using CFD techniques while; the best configuration is discovered from the selected geometries.