Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 3 of 3

Thread: No Suction on pump

  1. Back To Top    #1

    In the Industry
    Masspools's Avatar
    Join Date
    Jan 2013
    Cambridge Massachusetts

    No Suction on pump

    Hi all

    Pentair whisperflo pump 1.5hp 3ph.

    New pump installed in commercial facility, trying to prime it and it won't suck in the water. I have no back flow restrictions since the filter valve is on waste. All valves open on the suction side, the pump has suction, I checked the impeller. When I turn off the pump the water flows into the pump from the suction line on front. What could be happening here?

  2. Back To Top    #2

    Join Date
    Jul 2010

    Re: No Suction on pump

    With 3 phase it's an easy mistake to wire it where the rotation is backwards.
    18'X4' 7600 Gal AG
    3/4 HP Pentair Pump
    Hayward S166T 100 lb sand filter

  3. Back To Top    #3
    kellyetheredge's Avatar
    Join Date
    Mar 2013
    Lubbock, texas

    Re: No Suction on pump

    3 phase motors: at the breaker/disconnect swap any of the three wires. Swap 1 and 2, 2 and 3, 3 and 1.......just swap any two to reverse direction in any 3 phase motor. You can also swap any two wires in the "****** head"; the junction box mounted on the motor.
    14,364gal AGP
    Intex Ultra Frame 16'x32'x52"
    Krystal Clear™ Sand Filter Pump & Saltwater System - 2,650 GPH**Nite-Brite Halogen Pool Light
    TF-100 Test Kit (This kit Rocks)

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts