Ideas and tips

HOW TO BLEED RADIATORS

Practical guide on how to vent your radiator and why it is so important.

If your radiator is cold at the top and hot at the bottom, it probably needs venting (bleeding).

Oxygen pockets naturally accumulate in central heating systems due to the amount of fresh water flowing through them, which in turn causes radiators to become less efficient. Radiators require venting to relieve the accumulation of air, which in most cases is a manual process.

How to Vent/Bleed your radiator:

 

- Be sure to protect decorated surfaces with a cloth or small bowl to catch the water before opening the air vent.

 

- Venting is best done when the system is cold. To do this, simply switch off the heating system and open the air vent slightly (some radiators require a radiator vent key, others may require a small screwdriver) until you see water at the air vent (this means that all the air has been removed from the radiator

 

- Gently close the vent and then switch the system back on.

 

If the radiators have to be vented frequently, the system may be defective and you should call your heating engineer.


If the pressure should be lower, the correct operating pressure must be restored by turning the knob on the boiler. After venting the radiators, check the water pressure of the radiators by means of the boiler pressure gauge, the needle of which must be positioned between value 1 and value 2.

At this point, simply restart the system by switching the boiler or circulation pump back on and check that the radiators heat evenly.

 If not, it means that there is still too much air inside and it will be necessary to repeat the operation.

 

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