Last night I peaked in the basement of a building I manage, and noticed rusty water on the floor. It turns out that a 2" steel return pipe along the floor close to the wall apparantly corroded to a point that its leaking. And now my boiler is cycling on and off to refill. I will probably call someone in to fix it since it looks involved. It is a 10 foot length of pipe with elbows at each end. There is no union, so it will probably have to get cut out.
My question is besides steel, what is another alternative to replacing the pipe? I'm pretty sure copper, but that would be expensive for a
2"-10 foot length. Again this is the return line, not the steam riser.