A concentric reducer is used to join pipe sections or tube sections on the same axis.The concentric reducer is cone-shaped, and is used when there is a shift in diameter between pipes For example, when a 1" pipe transitions into a 3/4" pipe and the top or bottom of the pipe doesn't need to remain level. This pipe reducer may be used when there is a single diameter change or multiple diameter changes. Unlike eccentric reducers, concentric reducers have a common center line. Concentric reducers are useful when cavitation is present. Eccentricity occurs when the centerline is offset.