 ##  [Surge Tank](/surge-tank) 

  ##  [Surge Tank](https://engineering.quantumdictionary.io/surge-tank-0) 

  
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**Engineering &amp; Applied Technologies Dictionary**

 
Definition

A hydraulic reservoir—open or closed—connected to a pipeline or penstock that provides a local volume buffer to absorb or supply fluid during rapid flow or pressure transients, thereby reducing peak pressures, damping oscillations and stabilizing upstream/downstream hydraulic head.