- What to know
- Pouring water into the fluid tank puzzle details
- Arknights Endfield Ferrium Bottles explained
- How to pour water into Fluid Unit – Stumbling Into Qingbo Stockade quest
- Key mechanics in the Fluid Unit puzzle
- Common mistakes and how to avoid them
- What happens after the Fluid Unit is activated
What to know
- The puzzle relies on Clean Water stored in Ferrium Bottles
- Each Ferrium Bottle holds a fixed amount of water
- The Fluid Tank must receive exactly enough water to activate the system
- Successfully filling the tank powers the waterwheel and lowers a bridge
In Arknights Endfield, not all environmental puzzles are solved with switches or combat. Some require you to understand Endfield’s logistics systems, especially how fluids are collected, stored, and routed. The “Pour Water into the Fluid Tank” objective in the Stumbling Into Qingbo Stockade quest is one of the earliest moments where this design becomes explicit.
At first glance, the objective seems simple—just add water. In practice, many players get stuck here, particularly on console, because the solution is hidden behind inventory interactions rather than direct world prompts. The game does not ask you to interact with the waterwheel itself. Instead, it wants you to supply the Fluid Supply Unit correctly, using containers you already obtained earlier in the Destination: Wuling questline.
Once you understand how Ferrium Bottles and fluid separation work, this puzzle becomes straightforward and also prepares you for more complex liquid-based systems later in the game.
Pouring water into the fluid tank puzzle details
| Element | Details |
|---|---|
| Quest | Stumbling Into Qingbo Stockade |
| Puzzle type | Fluid logistics activation |
| Required item | Ferrium Bottles |
| Fluid needed | Clean Water |
| Capacity requirement | 10 units |
| Result | Waterwheel activation and bridge lowered |
Arknights Endfield Ferrium Bottles explained
The key item for this puzzle is the Ferrium Bottle, which you obtain naturally during the Destination: Wuling quest. These bottles are not just collectibles—they are reusable fluid containers designed for transporting liquids into industrial systems.
Each Ferrium Bottle has a capacity limit of 10 units, and the Fluid Tank in Qingbo Stockade is calibrated to accept that exact amount before it activates. If you bring empty bottles or partially filled ones, the system will refuse to operate, even though the interaction menu appears usable.
How to pour water into Fluid Unit – Stumbling Into Qingbo Stockade quest
Step 1: Make sure you have Ferrium Bottles from Destination: Wuling
Before starting, confirm that Ferrium Bottles are in your inventory. These are typically obtained by talking to Watchguards during the Destination: Wuling questline. Without them, the puzzle cannot be completed.
Step 2: Fill the bottles with Clean Water
Find a water source nearby. Open the Scan interface (R2 on console), and interact with the water source. From the Fill Fluid menu, select Clean Water and choose an empty Ferrium Bottle as the container.
When done correctly, the bottle UI will show:
- Clean Water
- Capacity filled: 10 units
You can repeat this process if you have multiple empty bottles, but only one fully filled bottle is required for this puzzle.
Step 3: Travel to the Fluid Tank / Fluid Supply Unit
Follow the quest marker to the Fluid Tank. This tank is connected via visible pipes to the waterwheel system and the drawbridge ahead. You’ll see interaction prompts once you’re close enough.
Step 4: Separate the water from the Ferrium Bottle
This is the step that confuses most players.
Interact with the Fluid Tank and open your inventory. Select the Ferrium Bottle that contains Clean Water. Instead of “pour” or “use,” choose the option to separate fluid.
Because the bottle capacity is 10 units and the tank requires exactly 10 units, the UI will confirm that all water will be transferred. Accept the confirmation.
Once completed, the Clean Water is sent through the pipeline into the Fluid Supply Unit.
Step 5: Confirm the Fluid Unit is operational
After transferring the water, the Fluid Unit’s status changes immediately. Visual indicators on the pipes and tank confirm that water is flowing through the system.
Step 6: Observe the waterwheel start turning
With water now routed correctly, the connected waterwheel begins rotating. This is not instant in some cases—give it a moment. Once the wheel reaches full motion, the puzzle is considered solved.
Step 7: Cross the newly opened bridge
As the waterwheel turns, the system lowers the drawbridge ahead. This bridge leads directly into the next area of Qingbo Stockade, allowing quest progression to continue.
Key mechanics in the Fluid Unit puzzle
| Mechanic | Purpose |
|---|---|
| Fluid containers | Transport resources manually |
| Capacity limits | Prevent brute-force solutions |
| Fluid separation | Supply infrastructure precisely |
| Visual feedback | Confirm correct system behavior |
This puzzle is a soft tutorial. Later areas in Endfield expand on these same ideas with multiple tanks, mixed fluids, and longer pipelines.
Common mistakes and how to avoid them
A frequent issue is filling bottles but never separating the fluid at the tank. Simply carrying water is not enough—the system requires you to transfer it.
Another mistake is trying to interact directly with the waterwheel. The wheel itself is not interactive; it only responds to upstream fluid flow.
Console players often miss the “separate fluid” option because it’s nested inside the inventory UI. Slow down and read the prompt carefully—the game does not highlight this step aggressively.
What happens after the Fluid Unit is activated
The Stumbling Into Qingbo Stockade water puzzle is the logical continuation of the waterwheel mechanics introduced earlier in Destination: Wuling. Where earlier puzzles focused on mechanical alignment, this one emphasizes resource logistics. Together, they form the foundation for how Endfield treats infrastructure: systems respond only when every prerequisite is satisfied.
Once the bridge lowers, the path forward is permanent. The waterwheel will not need to be reactivated, and the Fluid Tank remains functional for the rest of the questline.
Pouring water into the Fluid Tank may look like a simple objective, but it represents a key shift in how Arknights: Endfield expects you to think. You’re no longer just striking mechanisms—you’re supplying systems. By filling Ferrium Bottles with Clean Water, separating the fluid correctly, and watching the waterwheel come to life, you unlock the bridge and move deeper into Qingbo Stockade, fully aligned with Endfield’s infrastructure-driven design.
