Water treatment

The water treatment is a room built in Fallout Shelter.

Overview
The water treatment room is used to raise a dwellers Perception and can create water for your vault. It is one of the facilities available at the start of the game.

Water production
To increase the speed at which water is produced; Place dwellers with better Perception in this room.

Your water demand will go up the more dwellers you have. If it's supply runs low, dwellers will start to become irradiated.

Production/cost
The water treatment, like other rooms, gains a production bonus from being connected to another of the same type and level. The room will gain a +2 production bonus for each connected room. Upgrade costs will be 25% cheaper for a double room and about 34% cheaper when upgrading a triple room vs upgrading 3 single rooms.