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    Sludge remover and flushing

    Other than by professional power flushing can a CH system be cleaned out effectively? Is there any difference in effectiveness between the various brands of standard CH sludge remover ranging in price from c £5 to £20 per litre? Is it the case that normal flushing does not remove the...
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    Immersion heater on while central heating drained?

    Is there any reason why I shouldn't use my electric immersion heater while the central heating system is drained for replacement of radiators?
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    Radiator plugs - o-rings, washers or neither?

    I recently discovered that several of my radiator plugs have been leaking slightly, with varying degrees of corrosion evident, and on inspection I have found that some of the plugs are steel, some are brass and some are chrome-plated. Not surprisingly the steel plugs have corroded most, but...
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