What to do when radiators are leaking, read our steps to identify and repair a leaking radiator

How to repair a leaking radiator valve or pipe

If you notice that your radiators are leaking, it’s important to find the source of the leak and fix it before the problem escalates. 


What is causing the leak?


Often a sign of internal corrosion, a pinhole leak can occur when debris isn’t removed upon installation.


How can I fix the leak?


To fix a pinhole leak follow the steps below:


  • Turn off the boiler and allow enough time for it to cool down before attempting to handle the radiators. You do not, however, need to turn off the water
  • Relieve the pressure by turning off the valves at each end of the radiator
  • Remove the radiator, closely following the instructions in your manufacturer's manual
  • Flush out the system using a non-acidic cleaner
  • Replace the radiator

Information and other materials on this website are not intended to constitute professional advice and should not be relied upon. Please see our Terms of Use for further details.

Related articles

Tips on boiler maintenance

Boiler maintenance, safety, service & leaks

To guarantee your boiler's efficiency and longevity there are several things you can do to help ensure you have hot water and heating year round.  ...
Tips on preventing blocked drains

Preventing blocked drains

To keep your drains in good working order there are several things you can do:   Check your drains regularly   If you keep an eye on your...
Fixing a toilet that wont flush

Toilet won’t flush

If you’re having trouble getting your toilet to flush, and don’t want to resort to the bucket and water method, check these four components are...