Useful Information / Safety Tips

How to Bleed a Radiator

How to Bleed a Radiator

How to Bleed a Radiator

If your radiators feel cooler at the top than they do at the bottom, it could be because they need bleeding. Bleeding your radiators lets out any pockets of air which may be preventing the hot water which heats the radiator from spreading evenly. Removing these pockets is important as it greatly increases the efficiency of your heating system. This is why, here at GB Energy Supply, we've created a simple guide on how to bleed your radiator in just five quick steps.

  1. 1. Check which radiators need bleeding

    Turn your heating on and check each radiator individually to ensure that all parts of the radiator are giving off heat. If there are cold spots anywhere along the radiator, then it could need bleeding.

  2. 2. Turn off all heating

    You will need to ensure that your heating is turned off and all of your radiators are full cool before you begin. This will prevent more air from entering the system and also ensure that you don't injure yourself.

  3. 3. Make sure you have everything you need

    Before you start you'll need either a screwdriver or radiator key, a cloth to help grip the radiator key and either another cloth or a dish of some sort to catch any excess liquid which may be released when you bleed the heater.

  4. 4. Bleed the radiator

    Fit the radiator key into the valve at the top of the radiator, using the cloth to hold the key. Place the other cloth, or dish, at the bottom of the valve in order to catch any drips. Next, turn the key in an anti-clockwise direction until you hear a hissing sound which indicates that the trapped air is escaping. As soon as all the air has escaped, the water in your radiator will start to drip from the valve. Once this happens quickly turn the key in a clockwise direction to shut the valve.

  5. 5. Turn the heating back on

    Once you have finished, turn your heating back on and after a couple of hours check each radiator to ensure there's now an equal temperature throughout their entire surface area.