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The valve for ARC Raiders’ Switching the Supply quest is in the tunnels beneath Spaceport, near the central Launch Towers. For the shortest approach, enter through the opening southwest of the towers, descend the concrete slope, turn around at the bottom, and look on the right for a yellow-marked valve wheel.
How to reach the valve from the southwest entrance
- At Spaceport, head to the central Launch Towers and find the tunnel opening southwest of them.
- Go down the concrete slope. At the bottom, turn around and walk a short way into the tunnel.
- Look to your right for the yellow-marked valve wheel, then interact with it to switch the water supply.
This route is described by PC Gamer’s November 11, 2025 guide. The approach is near the middle of the map, so be alert to ARC enemies and other raiders while crossing the area.
How to orient yourself inside the tunnel network
If you enter from elsewhere, use the central cave-in as a landmark: the valve is slightly west of it, according to Shacknews’ April 7, 2026 guide. The southwest opening near the Launch Towers is the more direct approach; covered ladders to the northwest or east lead to a longer run through the tunnels. The guides do not give measured distances or compare the routes’ risks numerically.
Quest requirements and what happens after you turn the valve
The quest asks you to find the tunnels beneath Spaceport and locate and turn the valve in the same round. The guides say the valve interaction completes the objective, and extraction is not required for it to count. Afterward, return to Speranza and speak with Celeste to complete the quest. Shacknews and Destructoid’s November 2025 guide describe the one-round requirement and extraction guidance.
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- ARC Raiders Deluxe Edition includes the base game and the following content: The Wanderer Set, including the following cosmetic items: “Valente” Outfit" “Pathfinder” Backpack,“Blanket Roll” Backpack Attachment.
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Quest giver and listed rewards
The community-maintained ARC Raiders Wiki quest reference lists Celeste as the quest giver and Source Of The Contamination as the preceding quest. It records the rewards as a Radio Renegade Outfit (Blue Color), one Spaceport Trench Tower Key, and three Synthesized Fuel; Destructoid also reports the Synthesized Fuel reward. Rewards may change with updates, so check the in-game quest panel if the current reward list matters to you.
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