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  • Mickjohn's Avatar
    25th September 2020, 03:47 PM
    Hi All I can tell you is that the system was installed in 1978, the first grundfoss pump was changed in 2003 and second grundfoss one is still going...
    15 replies | 1129 view(s)
  • Mickjohn's Avatar
    24th September 2020, 12:18 PM
    Hi many thanks I think I understand now....:) Mick
    15 replies | 1129 view(s)
  • Mickjohn's Avatar
    24th September 2020, 11:58 AM
    Hi thank you for your reply an earlier post says the automatic by pass valve should be on the other side of the pump from the boiler and my pump is...
    15 replies | 1129 view(s)
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