The Vault - Fallout Wiki

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The Vault - Fallout Wiki
Water treatment
FOS Water1 1-1.png
FOS Water1 1-2.png
FOS Water1 1-3.png
Cost100 caps
+25 caps per existing room
Game tile Fallouit Shelter.png
Game tile Fallouit Shelter.png
Fallout Shelter Icon.jpegThe following is based on Fallout Shelter and some details might contradict canon.

Water treatment is a type of room that can be built throughout a given vault in Fallout Shelter.


Water treatment rooms create water resources for a vault, and are affected by the Perception stats of residing vault dwellers working within them. These rooms can be built and utilized immediately, and are a crucial element towards maintaining a successful vault.

Resource modifiers

Vault dwellers with higher Perception stats will produce additional water resources, which is crucial as a vault increases in population, as water demand will continue to rise.


Water treatment rooms will gain a +2 production bonus for each connected room of the same type, with upgrade costs being 25% cheaper for double rooms, and 35% cheaper for triple rooms, all in comparison to building multiple single rooms throughout a vault.

Single room Double room Triple room
Water treatment output 8 18 28
Water treatment storage 50 100 150
Water treatment upgrade cost 250 375 500
Water treatment output 10 22 34
Water treatment storage 75 150 225
Water treatment plant upgrade cost 750 1125 1500
Water treatment plant output 12 26 40
Water treatment plant storage 100 200 300