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Cuprium production successful, but it also generates Sewage. Once Sewage fills up the Cache, the Refining Unit will become clogged and stop working.

Make a pipeline connection from the Refining Unit to the Water Treatment Unit so that the Sewage byproduct gets treated and keep the production line working.

The Water Treatment Unit is placed outside the factory area.

Use the Conduit Inlet and Conduit Outlet to move Sewage produced by the Refining Unit to the Water Treatment Unit for processing.