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Fernox DS40 Central Heating System Cleaner 1.9kg

Item Code: 344790001

£35.55Ex VAT£42.66 Inc VAT
Click & CollectAvailable for collection
DeliveryFree next day delivery options available (restrictions apply)
Fernox DS40 system cleaner rapidly removes limescale, black sludge and other deposits from boilers and central heating systems. This fast-acting, citric based acid cleaner is ideal for use when powerflushing and can also be used to descale a heat exchanger or boiler component separately.


  • Effectively removes limescale, black sludge and other deposits
  • Restores circulation and improves heating efficiency
  • Can be poured as a free-flowing powder directly into a powerflushing unit
  • Can be used to descale a boiler separately
  • Turns yellow when product exhausted
  • Compatible with all mixed metal systems
  • Neutraliser sachets included
  • One box is usually sufficient to clean a typical domestic central heating system
Weight (kg)2kg
Data Sheets


  • Belgaqua


  1. CS344790001 Product Data Sheet.pdf
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