Concentric reducer

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A copper concentric reducer

A concentric reducer is used to join pipe sections or tube sections on the same axis.[1] The concentric reducer is cone-shaped, and is used when there is a shift in diameter between pipes.[1] 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.[2] This pipe reducer may be used when there is a single diameter change or multiple diameter changes.[1]

Unlike eccentric reducers, concentric reducers have a common center line. Concentric reducers are useful when cavitation is present. [2] Eccentricity occurs when the centerline is offset. [3]

See also[edit]


  1. ^ a b c Reducer. (n.d.). Retrieved June 26, 2016, from
  2. ^ brass rivet nuts b Shumaker, T. M. (2004). Process Pie Drafting (4th ed.). The Goodheart-Willcox Company.
  3. ^ Reducers used in Piping Industry: A short literature. (n.d.). Retrieved June 26, 2016, from