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Thread: Pulling from skimmer vs bottom drain

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    zimm's Avatar
    Join Date
    May 2013
    Northern Virginia

    Pulling from skimmer vs bottom drain

    I just took over care of a pool with the house we bought. The prior owner told me the pump doesn't have enough suction to run both the bottom drain and skimmer at the same time (there's a valve position for both... I think). She left it on skimmer unless leaving the house for a while or during a storm, in which case the bottom drain was selected to not worry about clogging the skimmer basket.

    On day 1 of having the house, I tried it on "both" and the next day the pool was a cloudy, algae mess. I think it was just bad timing because the chlorine was zero. I shocked it back to life and now it's nice and clear. I'm just confused on what I should be pulling from for the filter.
    45'x12' 17k gal, IG plaster, Pool Pilot Nano+ SWG, 1/2hp Whisperflo pump, PAC-FAB TA-60D sand filter, Raypak 266 heater
    Pool School + Test Kit + Pool Math = Trouble Free Pool

  2. Back To Top    #2
    Richard320's Avatar
    Join Date
    Jan 2010
    San Dimas, CA (LA County)

    Re: Pulling from skimmer vs bottom drain

    There's a good chance you had stagnant water in the drain line.

    I just played with my diverter so I have some flow through the main drain - not much; there's just the slightest visible reduction of turbulence in the skimmer. That's enough to keep the water circulating down deep, so there isn't that temperature stratification you find in some pools.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

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