Correct terminology for mitered pipe junctions.

[Michael Thomas]

What is the correct term for this type of piping?

Is this a kludge, or a technique?

Any special concerns when you see it?

[Rick Sabatino]

That is very interesting. By the rust I guess it is metal with a weld? I've not come across that. Is this one from your house with the concrete staining?
What do the wires through the floor go to?

Rick