This article describes how the Merge Pipes command of GeoSTORM software allows the user to merge two or more connected pipes into a single pipe.
Notes:
- When merging pipes, the attributes of the selected pipe with the largest diameter will be applied to all the merged pipes.
- When merging pipes, all interior nodes (i.e., manholes, junction boxes, catch basins, and routing junctions) connecting adjacent link elements will be deleted.
Follow the steps below to merge two or more connected pipes:
- From the Input ribbon menu, click the Stormwater Pipes dropdown menu and select the Merge Pipes command.

- The Merge Pipes dialog box will be displayed.

- From the Select Pipes section, check the corresponding checkboxes of the pipes that need to be merged. Alternatively, click the [Pick] button to manually select pipes from the Map View.
![[Pick] button](/wp-content/uploads/sites/25/2024/06/Merge-Pipes-Command-Image-3.png)
Note: To select/deselect all pipes at once, check/uncheck the Pipe checkbox. - The number of selected pipes will be displayed in the Total selected read-only field.

- After selecting the pipes, click the [Apply] button and the software will merge all the selected pipes.
![[Apply] button](/wp-content/uploads/sites/25/2024/06/Merge-Pipes-Command-Image-5.png)
- If the user has selected pipes that are not connected along a single alignment, the following informational dialog box will be displayed on clicking the [Apply] button.

