Hello all. I need to remove a cast iron radiator next month for a bath remodel. I've done this many times but not during cold weather when the system needs to be on during renovations. I initially thought I could take out the radiator and plug the unions, but apparently there are differing opinions on this. I read that some people plug and others put a jumper pipe in between the two. I don't see the problem with plugging the supply and return since closing the valve somewhat does this anyway. What to do? thanks