Humming Central heating...

[ian413]

I have noticed my pipes going into/ out of my boiler are humming, this seems to be reduced when I tighten the 1 inch grey lagging around it with my hand.

It can sometimes build up to a very annoying droning sound, this is when I just switch the whole system off as it's night time and I dont really need hot water or heating. I then switch it back on in the morning. The humming will persist.

Any quick fixes out there? Is the answer to tighten the lagging around the pipes as I do when I just grip it with my hand? Or do they need to be attached to something properly???

The central heating has been off for a few months now and it is only on for baths etc, which is on a timer twice a day.

 

[Agile]

I can only guess that its the pipes vibrating from the pump.

The pump should only be on speed two so turn it down if its on three, even try it on two.

Often pipe resonance is caused by tensions during installation. That can sometimes be released by loosening and retightening compression joints.

It also sounds as if you have a pump over run without an auto bypass.

Without full details of your system design its not possible to be more specific.

Tony Glazier