Cleaning a heating system removes existing contamination, but preventing new debris is just as important. A magnetic filter is one measure that may help protect a UK central heating system after flushing.
What does a magnetic filter collect?
Corrosion in metal heating components can create magnetite and iron-rich particles. A magnetic filter captures much of this material as system water passes through it, reducing the amount that circulates through the boiler and radiators.
Why fit one after cleaning?
A newly cleaned system can begin accumulating debris again if corrosion continues. A filter works alongside inhibitor and correct system maintenance. It does not replace flushing when heavy sludge is already present.
Maintenance requirements
Filters need checking and cleaning according to the manufacturer’s guidance. An engineer should install and service the filter correctly, while the system should remain at the correct pressure.
Conclusion
A magnetic filter can be a useful part of a wider water-treatment plan. Discuss suitability with a qualified heating professional, especially on older or unusual systems.