How To Change A Cast Iron Radiator Section

Posted: Thursday, August 19, 2021

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Should you ever need, or want, to change one of our cast iron radiator sections, this blog will talk you through exactly what you need to do.

Although they are of outstanding quality, we also design our radiators to be practical. 

Functionally, they work exceptionally well as the high-grade cast iron that we use retains heat far better than standard steel. This means that our radiators heat your home both cheaply and efficiently.

We also take care of the hard work, so that when it comes to putting our radiators together and installing them, you have the easy job!


Use the following steps to change a radiator section: 

  • Remove the end cap from the radiator 
  • Insert the tool and loosen each side equally.
  • Remove both of the one-time-use gaskets and screws and replace them.
  • Use the radiator tool to join the sections together and tighten equally.
  • Add the endcap and bleed the nipple. Do not use sealant.Step-By-Step 

YouTube Tutorial 

As well as providing you with this written step-by-step guide, we have also created a video that can walk you through the entire process of changing a radiator section. 

You can view this ‘how-to’ video below:

All of our ‘how-to’ videos are also available on our website, simply follow this link.


Our step-by-step list and video make changing a section of your cast iron radiator nice and straightforward. However, if you are still lacking confidence, or just do not have enough time to complete this task, you have the option of hiring an installer. 

We have provided a list of tradespeople who can complete this job for you here, and you can simply search by your postcode.

These installers have all previously been used by Trads, and we have received positive feedback about them from our clients.

That said, we also cannot guarantee their work and accept no liability for their services. 

Contact Us

If you have a question about changing a cast iron radiator section, or any other queries, please contact us via our website here.

Alternatively, you can speak to a member of our team on the phone by calling 01400 263320.

You can also keep up to date with all of our news by following us on Instagram, Facebook, or Pinterest.

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