mystery behind the pink pipes

what’s the mystery behind the pink pipes in berlin? an art installation? do they follow the trail of the berlin wall? why are they pink?

if you follow the them till one end, you will always get to a construction site and if you follow it to the other end you will always get to a canal or a drainage. because whenever there is a construction in the center, the foundations reach into the water and these pink pipes just pump them away. 

the reason of their pinky color is the thoughtfulness of the company which provided the tubes. 21 years ago, they asked a psychologist to choose a color that children and younger people would like.