Hi. I posted a few weeks ago because after my central heating system was drained and leaking valves repaired, I could hear the sound of water gushing and coursing through my rads and pipes. The really helpful forum advice was that there must be air in the system and to keep bleeding the rads. This worked temporarily but the noise came back so I called out another central heating engineer. He said the same - there was nothing to be done except bleed the rads. I've bled them twice a day for 10 days and there is marginally less noise, but I can't cure the problem. All I can do is turn down/off the rad (using the TRV) nearest where I sit as the noise drives me mad. I have a 3-year old Worcester Bosch Greenstar CDi Classic combi boiler. Please is there anything else I can do?
Welcome to the forum. Although you can post in any forum, the USA forum is here in case of local regs or laws
View the thread, titled "Cannot get rid of air in rads and pipes" which is posted in Air Sourced Heat Pumps Advice Forum on UK Plumbers Forums.
Have you added inhb ?
Rob Foster
Esteemed
Ok , does the system loose pressure, do,you have to top it up. Chk
Rob Foster
Esteemed
Well it’s obvious, if he is topping up,the heating system then there will be an undetected leak somewhere.
Chk
Might not be air but corrosion
What if They ain't and whats inhib got to do with it ? DPK
Particles ?
Hydrogen being produced via corrosion
Rob Foster
Esteemed
So this system is producing more hydrogen every 3 days than ineos Chlor ?
I should read posts properly
If the pump speed is set too high, that can cause turbulence and/or cavitation, which be noisy and may cause corrosion and gas evolution.
Old TRVs may be noisy if fitted on the return rather than flow side. More recent ones are more likely to be non-directional.
Old TRVs may be noisy if fitted on the return rather than flow side. More recent ones are more likely to be non-directional.
Hi and thanks. No, the system doesn't lose pressure. It's at 1 1/2 bars. Amazingly, I've been bleeding the rads twice a day for 10 days and i've only had to top up the water once (and then not very much). I wouldn't say I'm getting air out of the system, unless it's possible for air and water to spurt out together. I don't know if that's possible.
Rob Foster
Esteemed
I suppose your only next option is to,drain the system , refill with fresh water and see ,obviously later on after a few days you will have to add some inhibitors ...centralheatking
Get one of these fitted a put 2 litres of sentinel x100
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Reply to the thread, titled "Cannot get rid of air in rads and pipes" which is posted in Air Sourced Heat Pumps Advice Forum on Plumbers Forums.
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