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Thread: Pool Closing - To Add Anti-Freeze Or Not?

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    Pool Closing - To Add Anti-Freeze Or Not?

    I've talked to different pool owners and pool stores, and there is no consistent answer. Slightly more than half say to add, the rest say it is unnecessary. We do get freezing conditions up here, so I'm inclined to think it is additional insurance, although now I'm not so convinced anymore.
    new in 2009 - 18' x 36' IG vinyl liner, 23,300 gallons
    24" sand filter w/ 1.5hp pump
    Polaris 280 cleaner w/ booster pump

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    polyvue's Avatar
    Join Date
    Aug 2009
    Sacramento, California USA

    Re: Pool Closing - To Add Anti-Freeze Or Not?

    I think the answer to your question is... that there is no one right answer. I think a good number of people on this forum add antifreeze, but some just blow out their return lines and plug them.

    Welcome to TFP!
    14,555 gal in-ground 16'x29' white plaster Pool w/spa (2007); Goldline Aqua Logic AQL-PS-8 control w/Aqua Cell 15 Salt Water Chlorination (SWCG); Hayward TriStar 1HP (1.85 SF) main / 1.5HP (1.60 SF) spa pumps; Hayward Swimclear cart filter C4025, ColorLogic LED lights; Tankless SP-18-4 electric heater; Polaris 280 cleaner.
    View of spiral galaxy in Ursa Major NGC6217 - Hubble Telescope 2009

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    Join Date
    Mar 2007
    Coastalish 'down easter'

    Re: Pool Closing - To Add Anti-Freeze Or Not?

    Welcome to TFP!!

    Here's my take on antifreeze for winterizing.

    1) IF you blow ALL the water out of the line, you don't NEED antifreeze. (Air contracts when it gets to freezing temps )

    2) If the lines run BELOW the frost line, you can blow MOST of the water out of the line and not NEED antifreeze - as long as there is nowhere in the frost line that might be full of 'puddled' water.

    3) If you're not sure if you've met the conditions in 1 and 2 Add enough antifreeze to protect the pipes!! $12 - 20 is a small investment to protect your pipes - if they have to be replaced you're looking at hundreds (probably at least $1000) to find the leak and repair the pipe, and possibly jackhammer some of the deck and replace that (which will FOREVER show as a patch

    IMO - if the lines are blown correctly and fully, you won't need the antifreeze, but I'd rather not take the chance of not having it in there

    Again, welcome here - and have a great winter (with no pipe damage )
    Luv& Luk

    Having done construction and service for 4 pool companies in 4 states starting in 1988, what I know about pools could fill a couple of books - what I don't know could fill a couple of libraries :-D

    POOL SCHOOL, TF Testkits, Jason's Pool Calculator, CYA vs. cl chart, (Just a few DARNED handy links!)

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