The pipe control tower is the tower that controls all the pipes... think of the pipes not as pipes, but as directions things are moving in. You're controlling all of that on a map, and the pipe shows where everything is going and you're changing it to be where it needs to go. You are in the control tower.

This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.