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  1. W

    luke warm rad

    I have a Grundfos ups 15-50x18 model b no.u347 pump fitted to my central heating system the radiator in the hall dose not get hot have bleed several times? the pump has the arrow pointing towards the boiler and away from the the feed to the hot water cylinder. is this correct!!! should I turn...
  2. W

    Grundfos cenral heating pump

    I have a Grundfos ups 15-50x18 model b no.u347 pump fitted to my central heating system the radiator in the hall dose not get hot have bleed several times? the pump has the arrow pointing towards the boiler and away from the the feed to the hot water cylinder. is this correct!!! should I turn...
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