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Mend Sludge Radiators Central Heating

Central heating makes a loud rumbling noise every few mins?

I think my central heating system needs flushing, how is this done? 2 of the radiators are older and may contain some kind of sludge inside, can this be done by me or does it require an expert?

nancy
January 2009
Heating, Oil Filled RadiatorsSludge Radiators Central Heating

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Rumbling Central Heating & Flushing - DIY or Expert?