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  1. W

    Potterton Prima b

    Its a Siemans, Landis and Staefa. Part No. MA-V322C
  2. W

    Potterton Prima b

    And where will I find that? I have noticed a three way valve next to my hot water tank, will that be the one?
  3. W

    Potterton Prima b

    Hi there, My boiler will only supply hot water to the CH system, when I switch on the HW, the CH comes on. With both CH and HW only the CH comes on. Anyone got any ideas? Thx
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