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Thread: Water inlet placement

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    Join Date
    Aug 2016

    Water inlet placement


    I have an above ground pool, 20 x 16ft and 4ft deep. I am curious about the science behind why heated pool water comes in near the top, as opposed to near the bottom (where it could rise up through the cooler water and warm it).

    Whenever we get into the pool, the top foot is warm, then it gets colder as you get towards the bottom (as heat rises!) Once stirred by a quick swim, it levels out but if you don't swim in it daily (stirring it up), the heater is fooled by the top foot of warm water into thinking it has reached temperature, when the stirred temperature is actually quite a way below what you want it to be.

    When swimming on holiday in a complex pool, I also noticed the warm water comes in near the top.

    Why is it designed that way? It doesn't seem logical.


  2. Back To Top    #2
    Mod Squad pooldv's Avatar
    Join Date
    Aug 2012
    DFW, TX

    Re: Water inlet placement

    Welcome to TFP!

    Pools need circulation at the top to move floating debris to the skimmers before it sinks. Most pools have eyeballs on the returns that could be pointed in a more downward direction to mix water and prevent heat stratification in the water.
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