Bleeding radiators, a necessary operation just when it starts to get cold: it will have happened to everyone that, when the heat of our home environment depends on heating, it does not work as it should. This often happens because some radiators do not heat up evenly and this implies a lower yield, or a higher cost. Or both!
The Bleeding radiators it is a simple operation, a little boring, but which we will thank heaven all winter for having done. If your radiators emit a gurgling, this is the article for you, it explains what they want to tell you with that funny sound.
Hot or cold purging of radiators
This intervention must be carried out when the radiators are open and, usually, at the beginning of the cold season then with semi-cold radiators. We take a bucket or a basin and if they are not open, we open them by turning the knob anticlockwise until it stops by itself.
We therefore identify the radiator bleed valve and we also rotate to let out the air that prevents our radiator from becoming hot evenly. Before we go crazy looking for the valve, let's try to look for it exactly on the opposite side of the knob we just used to open the heater.
If we have a autonomous heating, instead of using the knob, it is necessary to turn off the boiler from the electrical switch and increase the flow of water that circulates by holding the butterfly knob.
Bleeding radiators on or off
As anticipated it Bleeding radiators it is a very simple operation that must however be performed punctually, at least once a year, at the beginning of the cold season. It is noticed that it is necessary to realize it when the heaters turn on and something is wrong: they emit a gurgling and / or do not heat up their entire surface in the same way.
Even an inexperienced hand can safely proceed with it Bleeding radiators, therefore also ourselves, even reluctantly, thinking that once done we can see lower gas costs. If we do not eliminate the bubbles that run in the pipes of our system, in fact, the radiators will remain less effective and the consumption of the boiler increases to ensure that at home do not beat their teeth in the cold.
Bleeding of cast iron radiators
Also cast iron radiators they must and can be purged, for the same reason and with a similar procedure. For more information, I refer you to the detailed article on How to eliminate air from radiators.
Purging radiators: no water comes out
We were left with the gesture of opening the vent valve for it Bleeding radiators, at this point I hope you have placed the basin underneath because air and water should slowly come out in irregular alternation. As we wait, we will see only water coming out and with a nice constant jet that makes us understand that the radiator bleeding is finished.
If the water does not come out, the better check that the pressure gauge is okay, because it is the instrument used to measure the water pressure in the radiators, and if something does not return to us, we can act by carefully opening the boiler water supply tap.
To check if our Bleeding radiators has been successful, just turn on the boiler and check that they are uniformly hot. If not, they are still there air bubbles that disturb and we must continue with the same methods already learned.
Air in radiators: causes
Who obliges us to Bleeding radiators it is the air that forms in the pipes and it is caused by the difference in size of the pipes. As we have just said, it is not a demanding operation, just remember to do it also to avoid a disproportionate bill or a cold room.
Heaters usually remind us, muttering, but my advice is to get your hands on heaters this season, making sure they work at their best. If we find ourselves carrying it out Bleeding radiators very often, you need to ask yourself why and get one checked by a technician. In fact, it could be an obstruction in the pipes and experts can investigate with special probes and then eliminate the problem.
Related articles that may interest you:
- Maintenance of radiators
- Radiators that do not heat