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How to bleed your radiators.

Once the heating has been turned off, use your radiator valve key on the valve at the end of the radiator at the top, turn the key slightly to open the valve enough for the air to escape. It can be useful to have some tissue or cloth to hand as once the air is expelled some water may escape also, once this happens it’s a good indication that the air has been removed.



Note that most radiators will have the bleed valve at the top, or the side, but some heated towel rails may have the valve hidden from view, or in exceptional cases may not have one fitted, in which case you may need to consult your local plumber for help with this.


Tighten the valve again once the air has escaped, and then repeat this exercise for each radiator in your property, often you will find more air towards the top of the house or in the radiator(s) that are higher up due to the air rising to find the highest point.


Re-pressurise your boiler by adding more water into the system and then switch the boiler back on.

Warning: Do not over-pressurise your heating system, and be sure to check the manual for the recommended setting.

Once you have run the heating for a while, you may need to repeat the process to find more air pockets.

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