concentric reducer
File:1-1111 CU-solderfitting-type 5253-28x15.jpg concentric reducer]]A concentric reducer is used to join pipe sections or tube sections on the same axis.Reducer. (n.d.). Retrieved June 26, 2016, from http://www.pipingstudy.com/reducer.html {{Webarchive|url=https://web.archive.org/web/20170313150516/http://www.pipingstudy.com/reducer.html |date=2017-03-13 }} 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.Shumaker, T. M. (2004). Process Pie Drafting (4th ed.). The Goodheart-Willcox Company. 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.