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check ch pump works

  1. R

    Check Grundfos CH pump turning

    We have 2 x circulating and 2 x shunt pumps (for redundancy - we live in an old council building). Please could you advise the best way to find out if a pump is rotating or not? Any of the four pumps running will vibrate the others, so vibration doesn't help. I tried this little compass device...
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