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steam condensate

please see following
pumps keep getting air locked-any thoughts


  • ScottSecor
    ScottSecor Member Posts: 855
    edited November 2022
    We've had issues with similar pumps when used as boiler feed pumps.   Any grit (rust, etc) will wreak havoc.

    Is there a real fine strainer on the inlet side of the pumps?
    JUGHNE Member Posts: 11,060
    For simple sump lift pumps, (not really different than your steam Pedestal pumps), a 3/16 hole drilled in the discharge line just above the water line is recommended to avoid this. FWIW