Multicolor pipes that don't mix!
Mods introducing new content into the game.
Augmented or new ways of transporting materials - belts, inserters, pipes!
Things related to oil and other fluids.
The black pipes (normal + underground ) do not connect to anything, kind of odd because all the other colors are working
It should say in the tooltip that black pipes are only supposed to connect to other colored pipes, and not to machines and normal pipes.
