dude, honestly? I would be afraid. What is that a pic of the birds eye view of the bowl?

It could be "recycled" copper pipe, which is the easiest pipe to come across. You could bulldoze ANYTHING and find tons of it. We're talking about Belize here, I wouldnt put it past someone. Even though it has a little value being copper, its cheaper than Steel (china is buying lots of steel pipe right now driving up the price) and PVC (which is made out of petroleum and will obviously melt anyways.

It could be galvanized as well, which is Steel pipe dipped in Zinc so it wont rust. And zinc is in Cold Eaze and Zycam, so it sounds good for you, but is not.

I work in the Pipe industry, which means I didnt go to college.
Thats my knowledge about pipes. The end.