If a radiator is cracked, leaking, or a common "school style" with no decorative appeal, it is sold for its weight.
Places like Heritage Cast Iron Radiators or Wagner Salvage in Philadelphia maintain huge inventories for contractors and homeowners rehabbing historic buildings. who buys cast iron radiators
Local facilities like Kas Metal Trading or Ed Arnold Scrap pay by the pound (or hundredweight). If a radiator is cracked, leaking, or a