Factorio Forums

When holding an underground pipe, the fluid pipe visualization kicked in. Several parts of the pipeline are colored magenta, indicating they are all connected which is not the case. There have been a connection by accident. Removed the faulty pipe and cleared all contents of petroleum gas where it does not belong.
Still, visualization gets confused.

I expected it to show unused, empty pipe networks grey again.

Thanks for the report however that's working as intended. The pipeline retains the last color it used until another fluid is in the pipe.