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Thread: Pool Flow Recommendations

  1. Back To Top    #1

    Join Date
    Mar 2015
    Location
    Largo, FL
    Posts
    94

    Pool Flow Recommendations

    I have a kidney shaped pool and a connected 6ft diameter spa (shares water via a spillover that's just below the typical water line). I estimate it to be about 15,000 gallons total being moved by a 1 hp pump. It has one skimmer in the shallow end, close to the steps; 2 return lines, also near the steps; and 6 floor jets spread throughout the pool (as well as the spa jets and drain). The main drain is in the deep end, but is having some problems. Anytime it's open, a little air gets sucked into the pump. I'm not certain that the floor jets are working very well either, especially in the deep end. This obviously gives me some concerns about the circulation of the water in the deep end of the pool.

    1) Is there any good way to test how the water at the bottom of the deep end of the pool is circulating?
    2) What's a good way to test if the floor jets are working?
    3) I'm having the pool resurfaced in about a week and we had talked about filling in the floor jets and plumbing a couple new side returns. What's your opinion about floor jets vs. side returns vs. a possible combination of the 2 (don't fill in the floor jets, but still add the side returns)?
    4) Is a 1hp pump and 200 sq ft cartridge enough to properly circulate and filter 15k gallons of water? The equipment is about 15 feet from the main drain and 30 ft from the skimmer.
    5) How big a problem is it to have some air sucked in through the main drain? What kind of damage / issues can this cause?

    Thanks in advance for any and all help!

  2. Back To Top    #2
    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,879

    Re: Pool Flow Recommendations

    1) There are ways to test, none really easy, but odds are it is fine. It really doesn't take very much to get good mixing throughout the whole pool.
    2) Dive down to them an feel for water movement
    3) I am not a fan of floor jets, but some people like them
    4) 1 HP is more than enough for the pool. Depending on how active you like the spa to be it may or may not be enough for the spa.
    5) Big, air in the suction side can cause the pump to lose prime and occasionally that will result in the pump destroying it's self. Chances are it is a simple fix, but could be tricky to find the air leak.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
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  3. Back To Top    #3

    Join Date
    Mar 2015
    Location
    Largo, FL
    Posts
    94

    Re: Pool Flow Recommendations

    Quote Originally Posted by JasonLion View Post
    1) There are ways to test, none really easy, but odds are it is fine. It really doesn't take very much to get good mixing throughout the whole pool.
    2) Dive down to them an feel for water movement
    3) I am not a fan of floor jets, but some people like them
    4) 1 HP is more than enough for the pool. Depending on how active you like the spa to be it may or may not be enough for the spa.
    5) Big, air in the suction side can cause the pump to lose prime and occasionally that will result in the pump destroying it's self. Chances are it is a simple fix, but could be tricky to find the air leak.
    Thanks for the response. Unfortunately, I don't think that diving down to test the jets myself is really doable at this point. I'm on the tail end of getting rid of an algae bloom and the water still has too much chlorine in it. The leak doesn't seem to be causing any problems with the pump's priming. It's been running 23 hours a day for the last 2 weeks or so getting rid of that algae bloom and there haven't been any issues there. It's just little bubbles in the pump filter and some air in the return jets and a couple floor jets.

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