It is separate runs from the pipe that sticks out of the back of the house. One to the fire pit and one to the left of the pool for a future BBQ.
It looks like the circular polish treatment they do on Aluminum.
Gives you a metal deck look.
I plumbed mine from outside my side garage wall. Looks like the top part of your picture. Chrome pipe coming straight out of wall and curved 90 degrees down with rain shower head. Purchased one of those pull handle faucets you see on the emergency eye wash stations in labs. Put shade panels around it for privacy. All from HD except pull handle, about $100 total.