That's a picture of a ceiling-mounted steam radiator! Those (along with hot pipes for hot water) heat my apartment. TWO of FOUR are leaking! One just drips periodically in my room, and the second destroyed a stack of Stylus magazines, my Islands interview notes, and designs for the DADADADA: Lazers "Whims of Fantasy" EP's cover.
In related news, sometimes water leaks from my toilet. I put a piece of paper towel in front of it a week ago and it hasn't leaked since. I'm developing a superstition about it and I'm afraid to move the (possibly enchanted) paper towel.