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  1. Hurtle

    Grundfos chiller loop pump with 30ft positive head sucking air. Is it the pump?

    Hi, I’m in Taiwan and language problems limit the help I can get. We have a chiller pump line gravity fed from 4 floors above. Yesterday it stopped pumping and then started after air bleed 2 hours later. Chill water is 14 to degree Celsius. I can’t see it is the PVC pipes my Taiwanese...

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