Range from the cheapest fitting of a boiler magnetic filter £50 (K11 Plumbing and Property Maintenance based in SL9) to the dearest fitting of a boiler magnetic filter £140 (Mizzon construction based in HA6).
Comparing heating engineers estimates for fitting a magnetic filter gives you an idea of who will be better value but the best way to compare costs is to get actual quotes.
What to do - Get rates and quotes to connect a magnetic filter in HP8 by posting a job with HaMuch and we will send it to heating engineers in HP8.