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  1. I

    Changing CH circ pump

    Thankyou for your input.We have normal vented system with header tank,its a large house so need a powerful pump.
  2. I

    Changing CH circ pump

    Existing Grundfos super selectric pump has failed(20 years old) Have got a Grundfos UPS3 pump from somewhere(new) .Can i use this as a replacement or are specifications very different? Any advice appreciated CJG
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