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Any suggestions please? When we flush our upstairs en-suite toilet and it starts to refill, there is a horrible noise which appears to be coming from the pipes hidden behind the tiled box section in the bathroom which runs through the bedroom next door. The noise stops once the toilet has...

Tonight I switched off system and let cool down. Then vented rads on lower floor first (no air) then vented rads on upper floor (all had air except one) but all seemed to vent ok. No water overflowed from expansion tank this time! Then switched on and all rads seemed to heat up ok (except for...

Thanks for replying. I think the system was on at the time, but I have tried it so many times now, I think it does the same with system off as well ? I will try it again tonight with sytem off, then try again with system on and let you know later. Thanks Bob :D

I am experiencing problems with my central heating system as follows :- My upstairs radiators only get warm but downstairs they are hot ! Every time that i bleed the radiators, the expansion tank overfills and leaks water out of the overflow pipe. The additional water in the expansion tank is...