As I mentioned on my Project 365 blog, I opened up the plumbing/electrical chase today to see what’s inside. The answer? thankfully, not much. The main plumbing stack is against the outside wall, as expected, with some power and phone/cable wiring twist-tied to it (I’m pretty sure you’re not supposed to do that 🙂 ). There are also 4 copper pipes; I think these are hot side for the 2nd and 3rd floor heat, and the hot & cold supply for the 2nd floor bathrooms.
There is also a rather steely blue paint on some of the original plaster, and what I assume is original bead-board wainscoting.