Range from the cheapest replacing of a cold water storage tank £160 (Dtechfm based in CH7) to the dearest replacement of a cold water storage tank £300 (MOS Heating based in CH8).
Comparing plumbers estimates for replacing a cold water storage tank for your central heating 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 replace a header tank in CH6 by posting a job with HaMuch and we will send it to plumbers in CH6.