Expert Advice & News

How To Bleed A Radiator

Bleeding a radiator is a very simple task that can mean your radiators get hotter and make your central heating system work more efficiently. Excess air stops the radiators from working at their optimum and can mean that a radiator suffers from cold spots.

You'll need a radiator key, a small pot or bucket to catch any larger amounts of water and a cloth to wipe up.

Confident you can get the job done yourself? Simply follow this quick 10 step radiator bleed guide!

  • Turn your heating on.
  • Feel the top of every radiator (don’t burn yourself) and check for cold spots
  • Turn off your heating and wait till your rads are cool.
  • Grab your bleed key and old cloth for catching drips.
  • Insert your bleed key into the radiator bleed valve, holding your cloth underneath.
  • Carefully turn anti-clockwise to open the valve and listen for hissing as the air escapes.
  • When water comes out, turn the key back clockwise to close the valve.
  • Repeat on all radiators with cold spots.
  • Check boiler pressure and rebalance & repressurise if necessary.
  • Kick back, relax and get cosy.

Watch this video produced by B&Q for more help.