otg, the picture I looked at when I guessed "waterpipe" was the diagram drawing on the math page at another website. One of the off-site photos looks like a pipe applied to the right side of a larger cyclinder at an approximately 120-degree angle. That diagram shows an elliptical indentation or dis-lodgement where the long, skinny cyclinder (waterpipe) meets the larger cylinder.
I didn't see any other photos until today (Saturday). So are we supposed to be looking at the photo of the water heater room?
Phewww ...
Can you link to the photo?