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Thread: Anti Freeze in Main Drain

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    Join Date
    Feb 2012
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    Anti Freeze in Main Drain

    How do you put antifreeze in the main drain since you can't plug it? Seems like when you put the antifreeze in it would simply find its way up and our of the main drain into the pool.
    DIY 18x36 IG Vinyl Rectangle with 2 foot radius; Steel Walls. 8' steps w/t 2 step jets; 2 MD, 1 Skimmer, 2 returns; Hayward Pro Series 24 Inch 300# Sand Pool ; Hayward color logic 4.0 LED light; 2" PVC pipe 4 Jandy Valves, Hayward PL-P-4, SWCG

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    Mod Squad jblizzle's Avatar
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    Re: Anti Freeze in Main Drain

    Disclaimer ... I know little about closing

    The anti-freeze is heavier than water right? So it should stay down in the pipe below the pool and thus prevent the water in the pipe from freezing. I do not think you need to fill the entire pipe up all the way up to where you are pouring it in.

    Hopefully someone with experience will confirm.
    Jason, TFP Moderator
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    Re: Anti Freeze in Main Drain

    I was wondering if that was how it was, ie antifreeze heavier.

    Im still trying to figure out HOW to get antifreeze in there while also creating the air lock. Im blowing trough the skimmer gizmo with the jandy flipped to open MD.
    DIY 18x36 IG Vinyl Rectangle with 2 foot radius; Steel Walls. 8' steps w/t 2 step jets; 2 MD, 1 Skimmer, 2 returns; Hayward Pro Series 24 Inch 300# Sand Pool ; Hayward color logic 4.0 LED light; 2" PVC pipe 4 Jandy Valves, Hayward PL-P-4, SWCG

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