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The water purifier and industrial water purifier generate varying amounts of purified water in whichever settlement they are built in. Their production rates are much higher than that of a basic pump (10 and 40 respectively, instead of 3), usually making them the superior choice. However, this is counterbalanced by their need for electrical power, the considerably larger amounts of crafting components required to build them, and the fact that only a handful of settlements can support purifiers at all (refer to the list below).
Similarly to water pumps, should the water production exceed the settlement's demand, any excess water will be placed in the workshop inventory on a regular basis. Building multiple purifiers increases the surplus production accordingly.
When setting up such an operation, some things are important to keep in mind:
- Although a loading screen tip states that any settlement's defense rating should be equal to or higher than the sum of its food and water production, examination of the script used to initiate attacks indicates that one point of defense rating counters ten units of food and water production. However, food and drink items stored in the settlement's workbench, including non-producible items like bubblegum and dirty water, increase the chance of attack as much as food and water production do. Attacks are thus more often triggered by stockpiled food and water, than by production of them.
- A settlement will stop producing purified water if there are more than 5 drinkable items (including dirty water and alcohol) in the workbench, plus 1 for every 4 settlers. This extremely low cap is the reason water seems to only be produced after the player takes all the purified water from the workbench.
- Drinkable items stored in workbenches are also consumed at random by settlers, at a rate of one per settler per 24 in-game hours. This consumption occurs before water is deposited in the workshop at some settlements, and afterward at others. If there are not enough drinkable items in the settlement's workbench, items stored in workbenches in other settlements linked by supply lines will be consumed instead. If there are not enough drinkable items in all workbenches in the settlement's supply network, settlers who had to do without drinking will have their happiness capped at 30 for the next 24 in-game hours, lowering the settlement's happiness as a result, and triggering complaints of lack of water, even if the settlement has enormous production capability.
- As a result of the extremely low storage cap, settlements of population over 6 will experience occasional water shortages when the stockpile runs out, regardless of actual production, unless linked by a supply line to settlements with populations under 6. The most efficient water storage and supply settlement, maintaining sufficient population to have at least one provisioner, one farmer, and one vendor, is one with a population of exactly 4, which, assuming they are producing at least 6 units of water per day, will always have at least 2 purified waters available to supply to other settlements. Settlements with a population over six can thus sustain themselves in a supply network with a certain number of smaller water farming settlements with population 4, as follows:
- 7-9 population: 1 pop 4 settlement
- 10-12 population: 2 pop 4 settlements
- 13-14 population: 3 pop 4 settlements
- 15-17 population: 4 pop 4 settlements
- 18-20 population: 5 pop 4 settlements
- 21-22 population: 6 pop 4 settlements
- If a vendor is not required to maintain a high level of happiness, a settlement with a population of 2 will be able to maintain at least 3 units of purified water, as long as it produces at least 5 units of water every day.
Water purifiers must be placed on top of a water source such as a stream or pond, and require power to operate.
Water purifier (1)
Water purifier - industrialEdit
Science! Rank 1
Water purifier - industrial (1)
Possible building sitesEdit
Not all settlements offer the opportunity to build water purifiers due to a lack of suitable water sources. Below is a list of settlements that can support at least one purifier.
- County Crossing
- Echo Lake Lumber Far Harbor (add-on)
- Egret Tours Marina
- Finch farm
- Kingsport Lighthouse
- Murkwater construction site
- Sanctuary Hills
- Spectacle Island (allows for the production of 10,000+ units of water)
- Starlight Drive In
- Taffington boathouse
- The Castle (completing Taking Independence automatically activates one industrial purifier)
- The Slog
- Vault 88 Vault-Tec Workshop (already comes with its own variation of water purifier, the Vault-Tec water pump)
- Warwick homestead
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