Depending on condition, between $50-$200 seems to be going rate.
A column radiator is used to describe a typical cast iron radiator. The term describes the vertical columns that make up the radiator. The radiators can also be made out of steal and not cast iron. The steal is welded together.
There are several companies who produce or sell cast iron models of radiators. For example, try the company 'Cast Rads' of the 'Radiator Center' for these radiators.
1/2" - 2" depending on demand
The boiler has a circulation pump that circulate the water
To the top of flange where the radiator cap seals. Pressurized systems overflow to the surge tank when hot and draw the coolant back into the radiator when they cool down. The surge tank has the level mark cast into the plastic. If your radiator is low,the surge tank is probably dry. Fill both to the proper level.
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Radiator cores are typically made from aluminum and brass. Aluminum is used for the tubes and fins, while brass is used for the header and tanks. Aluminum is chosen for its lightweight and heat transfer properties, while brass is chosen for its corrosion resistance and durability.
The cast iron in the block is starting to rust. Drain the radiator, put in a good radiator flush solution and follow the directions, then fill the radiator with the right coolant. Since you're already having rust problems, put in some rust inhibitor. You may need to clean it again and put in more rust inhibitor after things settle down.
The weight of a home radiator can vary depending on its size and material. On average, a typical cast iron home radiator can weigh around 100-200 pounds. However, modern aluminum radiators are much lighter and can weigh only around 20-50 pounds.
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100.00
Buy a shorter one. Welding Cast Iron is a pain and to do what you want would require cutting out a section and re-welding the whole thing. Baseboard hydraunic heaters can be shortened but cast is a no go.