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Thread: What to do about a really strong return flow

  1. Back To Top    #1

    Join Date
    May 2010
    Kelseyville, Ca

    What to do about a really strong return flow

    My one return jet flows so hard that it is causing real problems. It has an adjustable eyeball that is approx 3/4", and it is approx 12" below the surface. I don't think installing more returns is an option. The flow is so strong that even with it pointed down and away from the skimmer, it forms a vortex on the surface of the pool. Bugs that are sucked into this vortex are shot half way across the pool. Many of the bugs lose their buoyancy and sink to the bottom of the pool, creating a mess. I could thread something else that is larger in the return, but then I would have something people would bump into. Any suggestions/solutions? Thanks in advance!
    15635 gal Silver Lake AG doughboy with 52" walls, 7' deep end, 48" normal level.
    1 1/2 hp Hayward pump, Hayward C-1500 150sq ft cartridge filter, 120gpm
    Hayward Navigator cleaner
    Shaded til mid morning, direct sun for approx 7-8hrs

  2. Back To Top    #2
    mcoonan's Avatar
    Join Date
    Aug 2008
    Mendota Heights, MN

    Re: What to do about a really strong return flow

    Is your eyeball replaceable? If so can you upsize to a 1" or just remove the eye. ... oduct.html
    Intex Ultra 18' x 52" AG 6,981 Gal.
    3 - 2'x20' solar panels
    Hayward XStream 1500 Cart Filter
    Hayward 1-1/2 HP 2-speed Superpump
    Aquabot Pool Rover
    2-Softub 300 hot tubs (yup just got one for the lake)
    TF Test Kit Doing the BBB for 7 years
    Medota Heights,Minnesota

  3. Back To Top    #3

    Join Date
    May 2007
    South Central NJ

    Re: What to do about a really strong return flow

    1) A larger eyeball size is needed to slow things. I suggest using 1" eyes.
    2) A smaller impeller/seal set will slow things more. I suggest getting the ones for a 3/4 HP.
    3) Your sig says 120 GPM. It's not You'd need 2.5" plumbing to get that much flow.

    Items 1 and 2 will have two effects, they will slow the flow speed of the water coming out of the return and lower your electric bill. The motor might even last longer since it isn't straining.

    Item 3 will likely become about 60-65 GPM by doing 1 and 2. It's currently more like 75 gpm.

    Owner of - PoolGuyNJ LLC
    Expert Pool and Spa Repairs, Renovations, and Augmentation. Helping people decide what is the right gear for meeting their needs. Expectations Set, Expectations Met, No Surprises.

  4. Back To Top    #4

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    duraleigh's Avatar
    Join Date
    Apr 2007
    Sebring, Florida

    Re: What to do about a really strong return flow

    I suspect that flow of 120gpm refers to the max flow rating for the filter.


    If that pump ever burns up, replace it with a 3/4 or 1hp pump. It's too big for your pool causing you to spend more for electricity.

    The smaller impellor is a good idea on your existing is the larger eyeball. You may try removing the eyeball entirely but you will lose directional control of the flow.
    Dave S. - Forum owner
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  5. Back To Top    #5

    Re: What to do about a really strong return flow

    I wish my returns had that kind of power! My single return is so weak that I only know it's on if I put my hand in front of it. There's no surface activity at all.
    Clearwater, Florida

    12,000 gallon kidney shaped gunite pool
    Pentair Whisperflo 3/4HP Pump
    Pentair CCP420 420sq/ft Cartridge Filter
    Pentair Intellibrite 5G 120V Pool Light

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