Something is gross about the water around here, and it's time to fix it. One of the quests you'll receive in ARC Raiders Items asks you to head into the Spaceport tunnels and turn a valve to switch up the water supply. Switching the Supply is a relatively straightforward quest, but the valve you need to interact with can be surprisingly challenging to spot if you're not quite sure where to look. That's what we're here for, though, so we'll tell you how to complete the Switching the Supply quest in Arc Raiders.

Before heading off, however, keep in mind that you won't need to extract with anything to complete this quest. So, you can bring in a free loadout just in case things don't go as you're planning. Spaceport is an active and dangerous map after all, so it's best not to take any unnecessary chances.

Your first objective is to find the tunnels located under the Spaceport. These tunnels can be found by visiting a large hole in the ground in front of the Spaceport Launch Towers in the center of the map. It's not too hard to spot once you know it's there.

Before you venture off too far, be aware that the valve you need to turn is actually surprisingly close to where you dropped down into the tunnels. As soon as you enter into the tunnels, circle around behind one of the collapsed pieces of concrete and examine the wall on the right. Here, you'll discover a red valve on a pipe. Interact with this to switch the water supply and complete the quest.

Since you don't need to extract with any specific items, you're now free to loot or extract at your leisure. It's worth noting that there is plenty of stuff to loot while you're down in the tunnels, safe from the large and scary buy ARCR Items roaming above you. Either way, when you're ready to finish things up, you can leave the way you came and find an available extraction point to head back to Speranza.