Why do i need to bleed raidators all the time!?
Discussion
Hi,
I seem to need to bleed radiators quite often (usually the ones upstairs).
After a couple fo days ro so (i think) i again have trapped air.
I turn the central heating off before bleeding.
I bleed the ones upstairs last.
Anyone have any ideas?
This started before the cold snap set in recetly.
Thanks,
Phil.
I seem to need to bleed radiators quite often (usually the ones upstairs).
After a couple fo days ro so (i think) i again have trapped air.
I turn the central heating off before bleeding.
I bleed the ones upstairs last.
Anyone have any ideas?
This started before the cold snap set in recetly.
Thanks,
Phil.
I had this problem a while back.
..it transpired the central heating pump had been installed above the pipe rather than below it - air was getting trapped in the pump ; seemed to cause an issue with air getting into most radiators.
when the pump was replaced the problem has [largely] gone away.
[FYI : I am not a plumbing expert - this is just my own experience ]
..it transpired the central heating pump had been installed above the pipe rather than below it - air was getting trapped in the pump ; seemed to cause an issue with air getting into most radiators.
when the pump was replaced the problem has [largely] gone away.
[FYI : I am not a plumbing expert - this is just my own experience ]
sinizter said:
Pints said:
How do you know when your radiator needs bleeding?
Been in our place for 3 years and haven't bled a radiator yet. Whether I need to or not is another question.
Probably when they stop getting as hot as they are supposed to. Atleast that's the rule I follow.Been in our place for 3 years and haven't bled a radiator yet. Whether I need to or not is another question.
alfaman said:
I had this problem a while back.
..it transpired the central heating pump had been installed above the pipe rather than below it - air was getting trapped in the pump ; seemed to cause an issue with air getting into most radiators.
when the pump was replaced the problem has [largely] gone away.
[FYI : I am not a plumbing expert - this is just my own experience ]
Another possibility is you have a leaky pipe. Doesn't even have to be a big leak, an almost invisible pin prick could be enough to cause your problem. Do you find you need to keep re-pressurising the system?..it transpired the central heating pump had been installed above the pipe rather than below it - air was getting trapped in the pump ; seemed to cause an issue with air getting into most radiators.
when the pump was replaced the problem has [largely] gone away.
[FYI : I am not a plumbing expert - this is just my own experience ]
Again, this is from previous experience. I'm not a plumber either.
I'm getting the impression that it's an open system with a header tank in the loft and not a sealed system where you top up the pressure via a filling loop?
If the latter then it won't be pulling air in through the vent. If you do have a vent, you could put your hand over it to see if it's sucking while the boiler is firing.
To check if it's hydrogen and not air, when bleeding a radiator, put a match near the gas coming out of the bleed vent. If it lights then it is hydrogen which would point at sludge deposits/ rust being the problem.
If the latter then it won't be pulling air in through the vent. If you do have a vent, you could put your hand over it to see if it's sucking while the boiler is firing.
To check if it's hydrogen and not air, when bleeding a radiator, put a match near the gas coming out of the bleed vent. If it lights then it is hydrogen which would point at sludge deposits/ rust being the problem.
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