Art, I got all of the plugs out of the radiators, I used a method a plumber friend suggested (after trying to use the 24″ wrench of course) I cut the nut off of the plug nut is hollow so then i cut down into the plug just short of the threads as to not damage the radiator threads. Then hit the edge of the plug with a chisel and hammer to bend or in some cases break the plug, and worked my way around the plug untill it could be spun out of the radiator. Some were quick, some took 45 minutes but the job is done. Do oyu have any suggestions for installing the new fittings, (teflon tape, adhesives etc.?)