Range from the cheapest fitting of a boiler magnetic filter £50 (Watertight based in RM11) to the dearest fitting of a boiler magnetic filter £180 (Jjgasservices based in RM13).
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 RM12 by posting a job with HaMuch and we will send it to heating engineers in RM12.

"Fit a magnetic filter"
RM10