Plumbing structures and machines are any items that deal exclusively with moving liquids from A to B in the colony as well as items who produce in real life sewage.

Some of those items have to be fed by liquid piping and need power, others are used manually. Some need to be placed on solid ground, others can float free in air or liquids.

Plumbing is also an item in Research. Many of the items below require a specific tier of research before they can be unlocked. 

Liquid moving items are:

Sewage related items are:

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