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title: "Flow Control or Diversion Devices"
canonical: "https://help.innovyze.com/space/xps/19663241/Flow%20Control%20or%20Diversion%20Devices"
format: markdown
---
**The concept of link-node** can be extended to include devices which divert stormwater out of a combined sewer system or relieve the storm load on interceptors. In EXTRAN, all diversions are assumed to take place at a node and are handled as inter-nodal transfers. Diversion devices modeled by EXTRAN include: Weirs (both side-flow and transverse), orifices, pumps, and outfalls. These are discussed in the paragraphs below.