Two questions: How do you change the name in personal teleporters, and how do you activate the 'flow control room' pipe in the cafeteria?

The teleporter item has a little bracket () at the end, I assume that's to label the item so you can make a note of where it goes, right? How do you add text to the item?

The other being, since you can fast travel around hydroplant with the pipes, the same pipe exists in the flow control room in the cafeteria. Where is the valve that activates that fast travel?