Adding protection to your boiler, alongside regular servicing should ensure that your boiler is relatively problem-free.
The best form of protection, that you can offer your boiler is in the form of a magnetic boiler filter that captures harmful particles that would otherwise damage your boiler and/or cause it to breakdown. Chemicals would be added to this filter to clean out all of the pipework removing any lime scale and corrosion that would otherwise turn into black sludge that could be incredibly damaging for your central heating system.
By filtering and cleansing corrosion before it has had chance to cause damage, allows the Magnetic device to prevent further distribution of the problem, as sludge will not be circulated around your entire central heating system.
Howarth Timber & Building Supplies supply award winning filters to suit all budgets.