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Thread: Effects of anti-freeze in pool water

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    Effects of anti-freeze in pool water

    When I closed last year I used antifreeze in the suction and return lines (RV/Boat/Pool AF) because I was using duck plugs for the first time. So I'm about to clear these lines. if I blow the Anti Freeze into the pool, any idea how that will affect my chemistry? Should I test and balance before the antifreeze hits the water? I'm thinking after makes more sense.

    Thanks.
    18x36 extended octogon IG Vinyl, ~ 110,000L (~29,000 gal)
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    Pool Tool's Avatar
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    Re: Effects of anti-freeze in pool water

    In general no effect, though that is debatable. I think the general consensus was that it won't really cause any negative issues if it gets into the pool, but where possible try to direct it away from the pool.

    What I did last year, was to start the pump with the filter set to waste. This cleared up the suction side. For the return side, I opened one return at a time and put my vacuum hose over the open return and directed the antifreeze water into the yard. Once the first return blew for a minute or two, I opened the other return and again used the hose for a minute. Fortunately, I have only two returns so it wasn't too bad. It was a little tedious especially doing it alone but better than seeing the pink cloud blow into the pool.
    16' x 32' (21100 gal), vinyl, 1.5 hp Hayward SuperPump,
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    Re: Effects of anti-freeze in pool water

    Thanks, that's good advice. I was trying to imagine suctioning out the returns. They have duck plugs in them, but I guess I should be able to pull one out and stick a plug in (I only have two).
    18x36 extended octogon IG Vinyl, ~ 110,000L (~29,000 gal)
    Jacuzzi FM24 Sand Filter, Hayward SuperPumpII 1hp
    Pentair Intellichlor SWG - IC-40
    TF-100 Test Kit


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    Saturn94's Avatar
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    Re: Effects of anti-freeze in pool water

    I thought I read somewhere here that antifreeze will eat up FC?
    20k IG vinyl liner/Aqua Rite SWCG, T-15 cell/Hayward Pro Grid 6020 DE filter/Polaris 280 with booster pump/Hayward Superpump 1 hp/city water/pool installed March 2004

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    Re: Effects of anti-freeze in pool water

    I thought I remembered seeing something also, but couldn't find it (I don't know if I'm using it wrong, but sometimes the search function shows 0 results for me), hence my asking. If I recall from last year Chem Geek mentioned something in a post, but it was off topic so I can't remember what the post was about. Maybe Chem Geek can chime in (is there way to tag someone in a post?).
    18x36 extended octogon IG Vinyl, ~ 110,000L (~29,000 gal)
    Jacuzzi FM24 Sand Filter, Hayward SuperPumpII 1hp
    Pentair Intellichlor SWG - IC-40
    TF-100 Test Kit


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    Re: Effects of anti-freeze in pool water

    https://www.google.com/url?sa=t&rct=...6_EcR4Tq342j9w
    I think this is what you are thinking of. It is rumored that ChemGeek is alive and well, but I don't believe is active on the forum as of late.
    16' x 32' (21100 gal), vinyl, 1.5 hp Hayward SuperPump,
    Tagelus TA60/60D Sand Filter, Raypak 399K Digital Heater, TF-100

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    Re: Effects of anti-freeze in pool water

    there was a post about a guy having stinging red eyes, and apparently it was caused by the RV antifreeze. He SLAM'ed the pool and it fixed his problem, so I would say that the antifreeze does indeed eat up FC. Though I would consider that a good thing.

    I don't understand the benefits though, even if you are using plugs. I blow all the water out of my lines, plug them, and call it a winter.

    17,500 gallon IG Vinyl
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    Re: Effects of anti-freeze in pool water

    Quote Originally Posted by camueller View Post
    I don't understand the benefits though, even if you are using plugs. I blow all the water out of my lines, plug them, and call it a winter.
    The reason was that I used duck plugs because of how low my returns are (I didn't want to drain that much water). I was concerned with them failing and letting water into the lines.

    18x36 extended octogon IG Vinyl, ~ 110,000L (~29,000 gal)
    Jacuzzi FM24 Sand Filter, Hayward SuperPumpII 1hp
    Pentair Intellichlor SWG - IC-40
    TF-100 Test Kit


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    Re: Effects of anti-freeze in pool water

    Quote Originally Posted by BestJoeyEver View Post
    The reason was that I used duck plugs because of how low my returns are (I didn't want to drain that much water). I was concerned with them failing and letting water into the lines.

    Sent from my SM-G900W8 using Tapatalk
    Ahh, I see. Now I understand why it would be necessary for some.

    17,500 gallon IG Vinyl
    Pentair Tagelus TA60D Sand filter
    Pentair Challenger 1.5HP pump CFII N1 1.5A
    Taylor K-2006-A, Stenner 45MPHP10 auto chlorine feed

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