Pipe to ground

Pipe to ground is the developer name for the entity commonly known in the community as underground pipe. It is an underground variant of the regular pipe that creates a connection across a gap of surface tiles so that fluid can pass from one entrance to the corresponding exit without requiring a continuous surface pipe along the intervening tiles. The community name "underground pipe" is the most common reference in discussion and guides.

Underground pipes can connect across a maximum distance of 10 tiles, which results in a gap of 9 tiles between the two ends when placed at the maximum range. The space between the connected entrances is not a storage volume; a paired set of underground pipes holds exactly the same fluid volume as two regular pipes, regardless of how many tiles the pair bridges. Because the gap holds no fluid, the apparent shortcut created by an underground pipe is purely positional and does not increase pipeline capacity.

Underground pipes share environmental constraints with underground belts in that they cannot transport items or fluids beneath certain special terrain types such as lava and space void. This restriction prevents creating functional underground links that pass under those terrains.

• The label "pipe to ground" is the developer/internal name, while "underground pipe" is the widely used community name.
• Maximum connectable distance is 10 tiles (9-tile gap at maximum).
• The gap does not store fluids; two connected underground pipes together equal the storage of two regular pipes only.
• Underground pipes cannot transport fluids beneath lava or the space void.