Sneaky Academy day 5

[Muffet]

Thought I was doing so well, got 3 jewels, a goblet of water and solved the number box and the shape clue for door but am completely stuck with the pipes.  I have them all joined but nothing happens.  Can anybody help??

[selfdefiant]

Move to the right a few scenes and flip the lever, a water fall will appear.

[sippet]

I got the same problem but this pipe puzzle does not influence your escape at all! Just try to find 4 jewels and you can escape.