SIGNALIS Guide | How To Solve Pump Puzzle

A guide on how to solve the Reservoir Drainage Puzzle in SIGNALIS.

Game Guide by Sabi on Feb 21, 2025

In the game SIGNALIS, players face a difficult problem in the Pump Room of the New Medical Ward. The goal is to equalize the water levels in three tanks, A, B, and C, to drain the flooded region and proceed through the game.

Understanding The Puzzle Mechanics

Signalis Guide, Understanding The Puzzle Mechanics

The Pump Room has three tanks:
Tank A was Initially filled.
Tank B was empty at the start.
Tank C was empty at the start.
The purpose is to adjust the water levels such that:
Tank A is halfway full.
Tank B is 3/4 full.
Tank C is empty.

Accessing The Pump Room

Before attempting the problem, make sure you have the Pump Room Key, which can be located in the Protektor Bathroom off the West Corridor. With the key in hand, head to the Pump Room, which is located in the southeast corner of the West Corridor.

Step-by-Step Solution

Signalis Guide, Step-by-Step Solution

When you enter the Pump Room, you will notice a letter on a desk outlining the solution.

Follow these steps to complete the puzzle:

Fill Tank B: Transfer water from Tank A to Tank B until it is full.
Fill Tank C from Tank B: Move water from Tank B to Tank C until it is full.
Tank C to Tank A: Transfer the water from Tank C back to Tank A.
Fill Tank C from Tank B: Transfer the remaining water from Tank B into Tank C.
Fill Tank B from Tank A: Transfer water from Tank A to Tank B.
Fill Tank C from Tank B: Once more, transfer the remaining water from Tank B to Tank C.
Tank C to Tank A: Return the water from Tank C to Tank A.