Habitation is where crew and passengers live, it produces sewage, which needs to be disposed of via a sewage system
All parts of the system can be linked to tanks via pipes for storage
Sewage is extracted from Habitation via a sewage pipe the player must installed below habitation. This is then connected to a waste treatment machine, then to a water purifier.
At this point it can either store water in a tank for passenger use, or be piped into an oxygen maker to generate O2