This mod adds a hotkey (Shift+O by default) to highlight any "orphan" underground pipes or belts near the player. An underground belt or pipe is considered an orphan if it does not have another connected end, or if the other end is still a ghost (if both ends are ghosts they are not considered orphans).

Press the hotkey again to hide any existing markers. Individual markers will also be removed on mining the highlighted pipe/belt, or rotating or building other pipes/belts to create a matched pair.

Compatible with mods that add new types or lengths of underground belts and pipes, including underground junctions and extenders (see settings below)
Compatible with Advanced Fluid Handling but note that while orphans are correctly detected, markers are not automatically removed when using that mod's underground rotation hotkey - if this happens use the Orphan Finder hotkey again to remove the markers.

Settings

• Search radius: tile radius from the player to search for orphans
• Underground pipe mode: how underground pipes are checked for orphans ("loose" and "strict" only have an effect on modded underground pipes with multiple underground connections)
  • Loose: underground pipes are orphans if they have any unused underground connections
  • Strict: underground pipes are orphans if they have no underground connections
  • None: no orphan checking for underground pipes

Credits

Inspired by matjojo's Underground Belt Spotter for Factorio 0.12, but with entirely new control logic and support for pipes as well as belts.