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    Micro bore central heating question

    Mum lives in a 3 story house. C/H has been run in plastic micro bore ( I believe 10mm ) Boiler ( Potterton suprima HE, recently serviced and informed in good order) in ground floor kitchen. Grunfloss 15/60 pump in a/cupboard on next floor up, with a large extended lounge on lower ground floor...
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