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Thread: I can't get the main pump to pump water, only air

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    I can't get the main pump to pump water, only air

    I am just coming out of the winter mode where I drained the water from sand filter and removed plugs on the filter pump and the Pentair automatic pool cleaner. Now I am trying to get to pool water balanced but I can't get the main pump to pump water. Only air. I have not changed the position of valves going to the skimmer and deep end. Looks like I need some directions.

    In-ground concrete/vinyl 21000 g, sand filter, Pentair 1 HP and 50 gpm. Pentair Legend in-pool cleaner, Nature 2 system (cartridge removed).

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    JasonLion's Avatar
    Join Date
    May 2007
    Silver Spring, MD

    Re: I can't get the main pump to pump water, only air

    First lets check some obvious things: you need to fill the pump strainer basket with water and then close the lid before turning on the pump. You also need to have enough water in the pool that the water level is filling the skimmer(s) nicely.

    More advanced: if you have valves that control various places the pump can draw water from, you want to adjust the valves so that only one water source is turned on. Then, after you get that one working, turn on the others one at a time very slowly so they can also get primed.
    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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