Cast iron radiators and some designs of steel column and aluminium radiators are “sectional” in nature, meaning they are made of a number of sections that are joined together. This enables a lot of flexibility when it comes to sizes, helping match up new radiators to existing pipes which cannot be moved, and it allows very long radiators to be created.
However, when radiators go over a certain length they can be too heavy or unwieldy to move in one piece, so it is standard radiator industry practice to supply such long radiators in 2 blocks for joining on site. These would be supplied with a special joining tool designed for that specific radiator model.
This video has been created to show laypeople and tradespeople how to join sectional radiators in the best and simplest way possible.