Reducers are fittings used to connect pipes of different diameters while maintaining flow continuity. Concentric reducers align centrally and are commonly used in vertical piping systems. Eccentric reducers maintain a flat side, preventing air or fluid accumulation in horizontal pipelines. Reducers help control flow velocity and pressure within systems. They are widely used in process piping, pump connections, and industrial pipelines. Proper reducer selection improves system efficiency and reduces turbulence. These fittings ensure smooth transitions between pipe sizes.