Draining the Pool is one of the first moments where Blue Prince expects you to understand how to move water around. The process looks complicated, but it’s really just about making enough space in the tanks to hold the Pool’s water. Once you do it, the entire Pump Room system becomes much easier to manage for the rest of the game.
Below is a clear explanation of what’s in the Pool and the exact steps needed to empty it.
What You Actually Find in the Pool
The Pool’s contents are small, but draining it teaches you something important about the estate’s water system.

You’ll find:
- A bit of currency
- Two trunks if and only if you bought the “Swim Trunks” from the Gift Shop
- No hidden rooms or deeper secrets
The main “reward” isn’t the loot itself. It’s the understanding that the game will occasionally ask you to rearrange water, not for a specific prize, but to unlock future areas or keep your layout manageable.
Role of the Pump Room
The Pool is the first time you’re forced to deal with the Pump Room. You can’t just flip a single switch; you have to clear space, move water, and manage capacity.

A few key points that become clear during this task:
- Each tank can only hold four units, which is not enough on its own.
- The Pool holds nine units, so you must redirect water into other rooms.
- Some rooms (like the Greenhouse or Kitchen) are useful “dump zones” early on because adding water there doesn’t break anything.
- Understanding this small puzzle sets you up for more complex water tasks later, like draining the Reservoir or adjusting the Fountain.

In short, the Pool isn’t difficult, but it’s the moment when the Pump Room stops being decoration and becomes a system you actively use.
Step-By-Step: How To Drain the Pool
Here’s the simplest reliable cycle you can follow.

1. Drain the Pool into Tank 1
- Select Pool on the panel
- At Pump 4, pull the lever up
→ This fills Tank 1 with part of the Pool’s water
This first fill shows you how fast the tanks max out. You’ll immediately realize you need somewhere else to put the water.
2. Empty Tank 1 into the Greenhouse
- Select Greenhouse
- At Pump 1, push the lever down
→ Tank 1 empties
The Greenhouse is safe to flood early on. It’s intentionally designed as a flexible space so you can learn the pump system without consequences.
3. Clear space by moving Fountain water into Tank 2
- Set Pump 2 to fill Tank 2
- Select Fountain
- At Pump 2, pull the lever up
→ Tank 2 fills with Fountain water
This step teaches you that to drain one room, you must partially drain another. The Fountain becomes one of the main “holding areas” later, so this is an important habit to learn.
4. Empty Tank 2 into the Kitchen
- Select Kitchen
- At Pump 3, pull the lever down
→ Tank 2 empties
Like the Greenhouse, the Kitchen is another forgiving location early on. You’ll return to it often as a place to temporarily offload water.
5. Repeat the cycle
Keep draining the Pool and then dumping water until all nine units are gone.
Once everything has been moved out, the Pool fully empties, and you can drop down to collect the items.
Should You Keep the Pool Drained?
Yes. There’s no reason to refill it, and it never affects future progress. Once you’re done, you can forget about it and focus on more important water-routing tasks.
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