If I add steel radiators to a single pipe cast iron radiator system will I get any corrosion, also if I change the pipework to a 2 pipe system using copper will I get any corrosion in the system. My other question is to do with adding a second pump on the boiler. The existing pump would drive the single pipe system and the new pump would drive the 2 pipe system. Over a period of time I would transfer the cast iron radiators to the new 2 pipe system. Is it possible to do this, the boiler only has a single flow and return connection so a second pump would need to connect to the same point as the existing pump. Am I likely to get any interaction between the 2 pumps or any other problems
Thanks
Thanks