Pipe to ground

Pipe to ground is the developer name for the underground pipe entity, which players most commonly call an underground pipe. It is used to connect two pipe networks over a short distance while leaving the intervening tiles empty, making it useful for crossing belts, paths, and other obstacles without exposing a surface pipe line.

An underground pipe can connect to another underground pipe up to 10 tiles away, which means it can span a gap of 9 tiles between its ends. The space between the two ends does not store any fluid; a connected pair of underground pipes has the same total fluid capacity as two regular pipes, regardless of how far apart they are placed within the allowed range.

• Underground pipes cannot be used to transport fluids beneath lava or space void.
• Underground pipes are often chosen for compact factory layouts because they preserve build space above ground while maintaining a continuous fluid connection.