Toilet
A place to empty bowels and wash hands. Let's have a National Washed Hands week.
Overview
The Toilet is a basic building that provides sanitation for your settlement. Once constructed, it functions indefinitely and does not require any Rat hands or ongoing maintenance to keep operating, making it one of the simplest utility buildings to keep in place throughout the game.
Because its upkeep cost is 0, it is generally worth building more than the minimum amount needed. A practical rule of thumb is to provide about one Toilet for every 10 A_Ratizen, and it is often better to place a few extra rather than risk having too few available when your population grows. Since it has no maintenance burden, adding additional Toilets is an easy way to prepare for expansion without creating a recurring resource drain.
Official description
A place to empty bowels and wash hands. Let's have a National Washed Hands week.