Range from the cheapest fitting of a boiler magnetic filter £30 (AG Plumbing & Heating based in TA6) to the dearest fitting of a boiler magnetic filter £150 (RM Plumbing & Electrical Ltd based in CF24).
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 BS23 by posting a job with HaMuch and we will send it to heating engineers in BS23.