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# Factorio Runtime Docs Version 2.0.77

# PipeConnectionDefinition - Runtime Docs

## PipeConnectionDefinition :: table

#### Table fields

connection_type | :: PipeConnectionType |
positions | :: array[MapPosition] | The 4 cardinal direction connection points for this pipe.
The 4 cardinal direction connection points for this pipe.
max_underground_distance | :: uint32? | The maximum tile distance this underground connection can connect.
The maximum tile distance this underground connection can connect.
flow_direction | :: FluidFlowDirection |
direction | :: defines.direction |
connection_category | :: array[string] |
linked_connection_id | :: uint32? | Only supplied if `connection_type` is `"linked"`.
Only supplied if `connection_type` is `"linked"`.

Concept used in

- LuaFluidBoxPrototype::pipe_connections