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Thread: What's the difference between top and side discharge.

  1. Back To Top    #1

    Join Date
    Nov 2009
    Cleona, PA

    What's the difference between top and side discharge.

    What's the difference between a side and top discharge on a pump? (Other than one spits up and one spits to the side.)
    13,500 Wilkes Vinyl AG (15'x30' rectangular)
    Hayward Power-Flo LX SP1580, 1HP
    Hayward S-160T High Rate Sand Filter

  2. Back To Top    #2
    MikeInTN's Avatar
    Join Date
    May 2007
    Middle Tennessee

    Re: What's the difference between top and side discharge.

    Most, if not all, of your sand filters need a vertical (top) discharge, and most, if not all, of your cartridge filters need the horizontal (side) discharge. I'm not sure about DE filters, but I would think they need a vertical (top) discharge as well.

    EDIT: Jason is correct; I got tunnel vision and was thinking of the pad packs (pump and filter on a plastic base), because it's what I have. To keep both the pump and filter on the plastic base, I have to have a horizontal discharge pump, because I have approximately 6 inches between the two. If your pump and filter separated, then you could use either.
    24' x 52" AGP - approx 13,500 gallons
    Pentair Optiflo 1 hp/2sp pump w/ Swimpro Voyager 150 sq ft cartridge filter
    Intex 8110 SWCG
    "Fear the Schnauz!"

  3. Back To Top    #3
    JasonLion's Avatar
    Join Date
    May 2007
    Silver Spring, MD

    Re: What's the difference between top and side discharge.

    As far as I know it is just a connivence thing. If you are replacing a pump that had the output in a particular place it is often easier to replace it with another pump that has the same configuration. If you don't mind a little plumbing you can use either one you want. Ideally, you want the one that results in a plumbing configuration that has the fewest fittings and the shortest pipe runs. Getting a pump that points a certain way can sometimes help with that. But the efficiency difference is usually very small, almost not worth worrying about.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

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