He'll give you some 10mm JHP ammo and two stimpacks.
tell me that you have found the chip.' tell him that you'll need weapons to complete the quest. To get some extra weapons, go to the command center (third floor) and repeatedly tell the overseer that you haven't found the water chip. In the first floor locker (near the big vault door), there are some flares. Most of the vault dwellers will refuse to talk to you during the quest. Returning to the vault is best done at 8:00 in the morning, saving the water thief quest for last. After traveling for a day, choose to either continue to Vault 15 or return to Vault 13 for a number of sidequests. Leave the Vault entrance, and head towards Vault 15. You don't have to kill them, but it will take you half way to the next level. points for a total of 500, they are quite easy to kill, you can dispose of them with a melee attack to not waste ammo. There are 20 Cave Rat's, they each yield 25 exp. The corpse next to where you start off has a Knife and 10mm x24. The game starts you off right outside Vault 13, the date is 05/DEC/2161 and the time is 0721, you have 150 days to retrieve the Water Chip.