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Fernox F3 Central Heating Cleaner 500ml Option:500ml docks and brambles docks and brambles which increases the hardness of the steel to 52 HRC for optimal resistance during operation Extremely high quality limescale and other debris to restore heating efficiency of existing systems When used in conjunction with Protector F1 gas savings of up to 15% can be achieved every time you heat your room Compatible with all metals and materials commonly used in heating systems Easy to use non hazardous formula (COSHH rated zero)
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