Brain Test 4 Level 129: Doctor Worry must find a way to stop that leak!
Brain Test 4 Level 129
Screenshots

Quick Answer
Drag the barrels away to reveal a hidden valve, then place it on the pipe to stop the leak.
Skills Tested
Step-by-Step Solution
- 1) Look at the barrels standing in the scene.
- 2) Drag the barrels away from their position.
- 3) Pick up the hidden valve that is now visible.
- 4) Place the valve on the pipe to stop the leak.
Hint
Reveal a hint
The barrels are hiding the part you need to stop the water.
Why It Works
The puzzle hides the solution behind an object. Moving the barrels frees the hidden valve, and applying it to the pipe is what finally shuts off the leak.
Frequently asked questions
How do I stop the leak in Brain Test 4 Level 129?
Drag the barrels away to reveal the hidden valve, then place that valve onto the pipe to seal the leak and stop the water.
What is the answer to Brain Test 4 Level 129?
Move the barrels aside to uncover a hidden valve, then set that valve on the pipe, which stops the water leaking and clears the level.
What is the trick in Brain Test 4 Level 129?
The tool needed to fix the pipe is hidden behind the barrels. You must clear them away before the valve becomes available to use.
Why do I need to drag the barrels in Brain Test 4 Level 129?
The barrels conceal the valve that closes the pipe. Removing them is required so you can access and place the valve on the leak.
Is there a video walkthrough for Brain Test 4 Level 129?
Yes, the embedded video shows the barrels being dragged away and the hidden valve being placed onto the pipe to stop the leak.
How do I avoid getting stuck in Brain Test 4 Level 129?
Do not try to touch the water or plug it by hand. Clear the barrels, take the valve, and set it on the pipe to finish quickly.