I want to make some family space in my basement. The problem is even though I have a very nice basement to work with, the supply and return pipes hang low that come from my boiler and feed my cast iron radiators.I'd like to know if anyone out ther has ever dealt with that problem and how they might have corrected it? I know that the old boilers such as mine depended on the pitch of the pipes to return water to the boiler.Can I raise the pipes, change the material of the pipes,steel to copper, change the pipe size, add an extra or larger pump to increase flow to make up for the pitch? Does anyone have any answers? I asked this old house the question but still have'nt gotten a response.Has anyone ever encountered this. I am a maintenance mechanic and can implement any solutions you may have but I've never encountered this before.