Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 9 of 9

Thread: Strainer Basket Lid Blows Off When Turning Off Filter Pump

  1. Back To Top    #1

    Strainer Basket Lid Blows Off When Turning Off Filter Pump

    Hey guys.

    When I turn off my filter pump, I get a backflow of water that blows my strainer basket lid off. Any ideas? Any help would be appreciated.

    Thanks.
    Attached Images Attached Images

  2. Back To Top    #2
    Lershac's Avatar
    Join Date
    May 2007
    Location
    Baton Rouge, LA
    Posts
    1,215

    Re: Strainer Basket Lid Blows Off When Turning Off Filter Pu

    Install a check valve?
    (DIY):16K Gal 20X30 rectangular IG Gunite, w/spa, CCP 520 filter,2 Pentair VS pumps, 400KBTU Pentair gas heater, Heat Pump for cooling, **update5.25.2013** added an intellichem with acid pump that will control existing SWG. My Build Thread Here

  3. Back To Top    #3
    Ohm_Boy's Avatar
    Join Date
    May 2007
    Location
    Orlando, FL
    Posts
    1,344

    Re: Strainer Basket Lid Blows Off When Turning Off Filter Pu

    Check for air in the filter. If there is a bleed valve at the top of the filter tank, open it and let the air bleed until it is all gone. If there is no bleed valve, you may unscrew the gauge and let the air out.
    Trapped air will compress when the system pressurizes, then when the pump stops, it pushes water back out.
    [center:1kpalu48]Helpful Links: Pool School | CYA/Chlorine Chart | Pool Calculator[/center:1kpalu48]

  4. Back To Top    #4
    Mod Squad Bama Rambler's Avatar
    Join Date
    Jun 2009
    Location
    SouthWest Alabama
    Posts
    22,342

    Re: Strainer Basket Lid Blows Off When Turning Off Filter Pu

    Look for a suction side leak. Air is getting into the system and cuasing the basket to be pushed out when the pump stops. It's a pretty common to have a suction side leak. Check the skimmer and weir, check the pump basket lid and drain plug(s).
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

  5. Back To Top    #5

    In the Industry

    duraleigh's Avatar
    Join Date
    Apr 2007
    Location
    Sebring, Florida
    Posts
    30,078

    Re: Strainer Basket Lid Blows Off When Turning Off Filter Pu

    Yeah, you are pulling air into the system and, as a result, pressurizing your filter. Once the pump stops, the pressurized air in the filter pushes, the water back through the system and pops up your strainer basket.

    Find that air leak on the suction side and the issue will be solved.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  6. Back To Top    #6

    Re: Strainer Basket Lid Blows Off When Turning Off Filter Pu

    It looks like there might be a leak right at the pump assy.

  7. Back To Top    #7

    Re: Strainer Basket Lid Blows Off When Turning Off Filter Pu

    I have small water leak at the pipe that comes out of the top of the Hayward Super II. Would that be it or is it more of a seal issue with the pump itself?

  8. Back To Top    #8
    Mod Squad Bama Rambler's Avatar
    Join Date
    Jun 2009
    Location
    SouthWest Alabama
    Posts
    22,342

    Re: Strainer Basket Lid Blows Off When Turning Off Filter Pu

    The leak you're looking for is on the suction side of the pump. A discharge leak won't cause the problem you're having.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

  9. Back To Top    #9

    In the Industry

    duraleigh's Avatar
    Join Date
    Apr 2007
    Location
    Sebring, Florida
    Posts
    30,078

    Re: Strainer Basket Lid Blows Off When Turning Off Filter Pu

    The leak you're looking for is on the suction side of the pump.
    +1
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

Posting Permissions

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