I have a house that is about 90years old, still runs a water boiler heat system (which works just fine, boiler was actually replaced a few years ago). I want to remove the 90year old black pipe for copper, I want to try and make the basement useable without huge pipes hanging everywhere lol.

Installing the piping is no problem for me. The question I have is their a certain way to route the piping to the radiators. The way it is right now seems over kill and redundant. Or can I just run a pipe basically, around the perimeter of the basement to each radiator?

 

What are the big pipes for? Only the basement, or the whole house? Some may be return lines for the other floors in the house, some may be supply lines for the other floors in the house. You'll need to figure out how the water is being fed to the other rooms, then determine if you can cut those out.

 

The pipes going up stairs have already been converted to copper back in the 90's.

I understand how the piping is ran, and I don't understand why(as previously said, looks redundant), that's more of my question.