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  1. B

    Overflowing cold water tank

    you might check the mains water is not backfilling into tank through crossed pipes or a need for a non-return valve
  2. B

    zoned heat and hot water

    am i right in thinking i can change between hot water and central heating on my new heating system by using a three port valve and have heat up or downstairs by using zone valves ,all without wall thermostats which are ugly,thanks. :? :? :?
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