Water Merchants ( location ) The Water Merchants , also called the Hub Water Tower , is the home of the Water Merchants , an organization specializing in the acquisition , transport and sale of potable water , one of the Wasteland ' s most valuable commodities . For a price , water can be bought to slake the thirst of one person or a thousand ; the only difference to the merchants is the cost . In order to maintain such a massive commercial entity , the Water Merchants came to dominate the entire southern section of the Hub , repurposing existing infrastructure and carting in more to support their endeavors . Layout . The Home Office . The Water Merchant section of town is given over almost completely to the water storage and refining equipment that keeps the Water Merchants in business . A massive water tower dominates this section of town , with pipes and holding cisterns taking up even more room . Flanking this massive operation are two large buildings : the home offices of the Water Merchants . Doing business with the Merchants is not difficult . They have few qualms and care little about political or humanitarian issues ; their only concern is the coin involved . As long as a prospective buyer has the funds available , the Merchants deliver water . Predictably , as clean water is extraordinarily valuable , the Merchants could afford to charge exorbitant prices . However , aspiring thieves would likely be disappointed ; despite the plethora of weapons guarding the Water Merchants ' section of town , little of value was stored in the home offices . Children of the Cathedral . A cathedral for the Children of the Cathedral can be found here . Mother Jain can also be found here , where one can preach , test her patience , or assassinate her for a quest from Decker . A few other people from the Children of the Cathedral can also be found here , such as Thorndyke , who can heal the player character for free ( as long as Jain has not been upset . ) Some people outside can also be spoken to , to find that they doubt the religion and believe it will die out . Involvement with the Vault Dweller . With the vault rapidly running out of water , a possible , but temporary , solution to Vault 13 ' s plight is the hiring of the Water Merchants by the Vault Dweller . However , the vault ' s secrecy is its greatest defense ; with its location disclosed , hostile forces could locate the sanctuary far more easily . While the inglorious death by dehydration could be staved off for a considerable length of time , a far more violent demise would step that much closer . The in - game effect of this is an additional 100 days in which to complete the quest . Notable loot . The shelves located in the northwest room of the Children of the Cathedral church contain several valuable items on them . These are : However , it is important to note that the door that gives access to the room is locked , and while attempting to unlock it , the Children of the Cathedral members can turn hostile . An average level of Sneak ( around 45 % ) should help doing it unnoticed . Bugs . There is a brahmin that keeps roaming around the central area , near the water towers . This brahmin can enter the southwest building when exploring it , standing still at the doorway and trapping the Vault Dweller inside . This is , however , a rare occurrence .