Pull the Plug is a side quest which occurs at the Thicket Excavations in Fallout 4.
Quick walkthrough
| Side Quest: Pull the Plug | |||||||||||||
| Talk to Sully Mathis. | |||||||||||||
| Repair the underwater pipes by turning the three valves in the flooded quarry. | |||||||||||||
| Start the pump. | |||||||||||||
| Kill the two mirelurks and speak to Sully for the reward. | |||||||||||||
| Reward: 200 XP 50-125 caps | |||||||||||||
Detailed walkthrough
Sully Mathis wants to unblock some underwater pipes at the Thicket Excavations. The pipes can be located by finding the bubbles on the surface and swimming down (water is irradiated, 10 per second). Each pipe can be fixed by simply turning a red valve located on the pipes. There are two exits from inside the dam, there is a lift and a staircase which are on opposite sides of the dam. The lift has a button at the top and bottom, and having it in the right position prior to navigating can be helpful. Underwater breathing boosts via the Aquaboy/Aquagirl perk or consuming a mirelurk cake are really not necessary, as the valves are not very deep underwater. The locations are in a triangular pattern; it helps to scope them out from above before diving in as the bubbles are clearly visible. A hazmat suit and/or some Rad-X helps counter the high rads.
After fixing the pipes and speaking to Sully, the player character must start the pump which will spawn two leveled mirelurks. The player may leave the zone and come back later or simply sleep 24 hours in the trailer right behind the big pump to discover that the lake has been drained and occupied by Raiders. At the very bottom of the dig site the player character will find Sully (now a much tougher boss, having a minimum level of 30) and several mirelurks in pens. The mirelurks can easily be killed if the player character doesn't open doors leading into their enclosures. In many cases, a single frag grenade should suffice. Sully seems to be breeding the mirelurks, for unknown reasons.
Quest stages
Notes
- Leaving the excavation zone before completing the quest will reset most of the containers on the location.
- Inside the only lit trailer the player character can find "Thicket Excavations Terminal" which holds "Sully's journal" holotape. The tape is priced at 888 bottle caps, which is unusual considering its contents.
- Inside the same trailer there are at least two locked containers with modified weapons and chems.
- With high enough Charisma Sully can be haggled with 3 times up to 125 caps for completing the quest. Consider using the quicksave trick to guarantee the haggling.
- If deciding to use power armor to navigate under water when returning to it the water breathing effect does not occur sometimes (it can occur in certain areas), this can result in drowning very easily. It seems to be in regard to whether or not their is underwater ceiling above the head. Either way it is possible to die that way.
- It is also considered to not be necessary to use Power Armor while fixing the pipes seeing that it makes them hard to get to and traversing the underwater area takes considerably longer than quickly shutting off the pipes and returning later.
- If Sully is killed before starting the quest, the quest can be started by turning the valves underwater, though the reward is fairly reduced.
- If Sully is killed at any time before the raiders move in then his position will be filled with a leveled "boss raider."
- Keep in mind that the player character is fixing the pipes to drain the water out of the quarry, one does not need to search underwater for loot. They can just focus on fixing the pipes. However, the area is farmable upon revisiting on a set timer so one can feel free to wait.
- Most companions, even those who normally like or dislike haggling attempts, have no reaction to any dialogue options in this quest.
Bugs
- If the player sleeps for 24 hours after killing the mirelurks but before talking to Sully, this quest's quest log entry will freeze and not go away.[platforms tag needed][verification overdue]
- After turning in the quest, the objective "Talk to Sully Mathis" may still show as incomplete. This can be fixed by returning to the quarry after the water has been drained.[platforms tag needed][verification overdue]
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