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Yup all the hot taps are effected. Cold ones are fine

Its the hot water distribution pipe, the one that is running from the boiler to the taps and yes i'm in a hard water area (London) however the plumber doesn't think that its scale as the flat is a new build and <5 years old. He could only guess that it might be some sort of construction debris

Hi there, anyone know of a way to unblock water pipes without physically replacing the pipe itself? I've been having issues with my hot water and the plumber pin-ed it down to a blockage in the pipe (not sure exactly where though) and recommended cutting and replacing sections of the hot water...

Yup there is a 3bar pressure reducing valve right after the mains. Have checked that (took it apart, no debris or blockage). I tested the flow from the filing loop as that what right after the reducing valve and right before the cold water feed into the boiler. Can't figure out why with that...

Thanks, will get someone to check on that. On the manual of the C36, it says that flow rates of <2.5 liters/min tru the boiler will not trigger a demand. Which seems to be true in my case I just moved in last year and this has gradually been happening. Nothing has been done as far as i'm...

Hopefully someone can shed some light on my problem. I've got a Keston C36 combi boiler in my 2 bedroom flat. The boiler is sensing that the DHW flow rate is ~2.5 liters/min which is on the borderline hence the doesn't fire up at times. This is happening at all the hot water taps in the...