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Thread: To drain or not to drain when winterizing

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    To drain or not to drain when winterizing

    Hi All,
    This will be my first time closing. I've read several blogs on the how to winterize and they all pretty much say the same thing, except I've found a difference when it comes to water level. Pool school says to drain water to below return jets and add anti-freeze. I've seen another site that says as long as lines are properly blown out and the right gizmos etc are used, draining is not necessary, nor is antifreeze. My pool is vinyl with no tile at top.

    The previous owners had water drained below skimmer, but not below return lines. Gizmos etc were used, as well as antifreeze. It seems to me that antifreeze can't hurt and would actually be a good safeguard. This may be obvious, but where do I pour the anti-freeze in... the pump?

    Any comments would be appreciated. Thanks!
    27K gallon, IG vinyl pool, SD80 Sand Dollar sand filter-Michigan, 1hp pump

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    Mod Squad Bama Rambler's Avatar
    Join Date
    Jun 2009
    SouthWest Alabama

    Re: To drain or not to drain when winterizing

    If I were in Michigan, I'd want belt and suspenders!

    I'd probably drain it below the returns, blow them out, and add antifreeze.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

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    blakeusa's Avatar
    Join Date
    Jul 2010
    Ashford, CT

    Re: To drain or not to drain when winterizing

    You can winterize or blow out the lines without draining--- HOWEVER you want to drain at least enough to allow for the snow and rain during the fall, winter and spring --- otherwise your pool will overflow.

    In CT I drain several pools I work on just below all the returns to make 100% sure all water is out of the pipes -- and to account for snow and rain fill.

    If you have coping it can also pop off if you get too much water and a freeze.

    In summary I think the benefits of draining at least below the returns is best.

    If you have a spa you gotta drain and get all the water out of the spa drains -- then plug and refill.
    25k 20x40 Gunite w/ integrated Spa & Caribbean Blue Plaster, Curved Bluestone Coping, Deck Jets
    Pentair Easy Touch/Wireless, Sta-Rite Intellipro SRVS Pump, Intellibrite Lights, & Pentair IC40 Cell, Sta-Rite 450sf Cartridge filter
    Heated from Central Boiler - Outdoor Wood Furnace & Triangle Tube Max Heat Exchanger
    ColorQ Pro

  4. Back To Top    #4

    Join Date
    Jun 2010

    Re: To drain or not to drain when winterizing

    But, I have a loop-loc cover and they say to just drain 18" below the top of the pool. I'm in Michigan as well. So, now what?

    26.7K gal. vinyl (16x38 - 8ft deep end), 1 HP Centurion pump, 300 lb Sta-Rite Sand Filter, Blue Sapphire cleaning robot, TF100 Test Kit

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