stn

  1. N

    Grundfos Water pump STN-3.0 B hot water

    This pump supplies hot and cold to the shower and hot to several other taps. It has been in place for around 10 years with no issues. If I put just cold through then it is OK (from a pulse POV but not for a comfortable shower) Recently, when the shower is turned on or indeed any of the taps...
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