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It forms when the water in the system reacts with the metal in radiators and pipes. Because sludge is heavier than water, it can settle in radiators and pipework and, if left to build up, it can damage the boiler and the system.
It’s important to have the water in your central heating system cleaned regularly to prevent sludge buildup, which can lead to blocked pipes and ultimately, cause breakdowns. Repairs needed as a result of sludge are not covered by Baxi warranties.
Boilers tend to break down as a result of sludge building up in the system. A magnetic filter captures these particles and prevents them from entering your boiler system, extending the life of your appliance and reducing the risk of a breakdown.
Cold radiators are usually a consequence of air being trapped inside the radiator. Simply bleed the radiator and the problem should be resolved. Sludge buildup can also cause differences in the top and bottom of your radiator and impact its efficiency.
If you notice your radiators are hot at the top but cold at the bottom, or need to bleed your radiators more often, then you may have sludge built up in your system.
