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Something about the water down here feels seriously off, and it’s time to put an end to it. One of the quests you’ll pick up in Arc Raiders sends you into the Spaceport tunnels to turn a valve and alter the water supply. Switching the Supply is a fairly simple quest overall, but the valve itself can be oddly easy to miss if you don’t know exactly where to search. That’s where Gamer Choice comes in—we’ll walk you through everything you need to know to complete the Switching the Supply quest in Arc Raiders.
Before you head out, it’s worth noting that you don’t need to extract with any items to finish this quest. Because of that, you can safely bring in a free loadout if things don’t go according to plan. Spaceport is a highly active and dangerous map, after all, so avoiding unnecessary risks is always a smart move.
With that said, let’s get the water flowing properly.
Your first task is locating the tunnels beneath the Spaceport. There are several different tunnel entrances spread across the central area of the map, but the one closest to your next objective is found at a large hole in the ground directly in front of the Spaceport Launch Towers. Once you know what you’re looking for, it stands out clearly.


Use the collapsed cement to carefully make your way down into the hole. Once you’re below ground, you’ll be inside the tunnels, and from here, your goal is to locate the valve that controls the water supply.
Before you wander too deep into the tunnels, keep in mind that the valve you need to interact with is actually much closer than you might expect.
As soon as you drop into the tunnels using the collapsed cement, move around behind the northeastern section of fallen concrete. Along the right-hand wall, you should spot a red valve attached to a pipe. Interact with this valve to switch the water supply and complete the quest objective.
Since there’s no requirement to extract with any special items, you’re free to either explore the tunnels for loot or head straight to extraction at your own pace. The tunnels offer a decent amount of loot and provide shelter from the large and dangerous ARC machines roaming above ground. When you’re ready to wrap things up, simply exit the tunnels the way you entered and locate an available extraction point to return safely to Speranza.
If you still have more objectives to tackle, make sure to check out our complete Arc Raiders quest list over on Gamer Choice.