Water is a blue liquid, transportable via pipes. Canisters of water can be purchased from traders or salvaged by logistics drones.
Water is a life requirement for the population, and must be present on the ship for long term survival.
The population will consume water that is in canisters or in tanks at a rate of 4 per cycle per individual. Water can be transferred to pipes and objects via a loader.
In addition to consumption by the population, water can be used to generate oxygen using an oxygen maker.
Water can be reprocessed from sewage by connecting a sewage pipe to a waste treatment machine, and then to a water purifier and connecting them all to a power source.