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Thread: Adding antifreeze when closing.

  1. Back To Top    #1

    Join Date
    Jun 2014
    New, England

    Adding antifreeze when closing.

    I'm still unclear about how exactly antifreeze gets added to the lines effectively.

    Is it ok, once I've blown out and sealed the skimmers and returns, to then unseal each skimmer and dump antifreeze in? Or is this just a waste of time?

    How does antifreeze get added to the lines properly for closing?
    26k Gal. 18' x 38' Gunite/White Plaster Roman style in-ground pool, straight Clorox bleach sanitizer, DE filter, TF-100 Test Kit, Taylor Salt Test Kit, Borate Drop test

  2. Back To Top    #2
    Mod Squad JohnT's Avatar
    Join Date
    Apr 2007
    SW Indiana

    Re: Adding antifreeze when closing.

    It will depend on how much you lower the water. I lower mine to just below the skimmer opening.

    For the returns, I add the antifreeze from the pump end after the returns are blown out.

    For the skimmer, I blow it out and add part of the antifreeze from each end. Then I seal it.
    TFP Moderator
    20K Gallon 20X36 Vinyl Inground
    Hayward S244T Sand Filter with 1HP Whisperflo Pump. Liquidator C-201 and Solar Heat

  3. Back To Top    #3

    Join Date
    Jul 2014
    Peoria, IL

    Re: Adding antifreeze when closing.

    It is all about how it is set up. I have auto over so I keep my water level and normal swimming level. I plug the skimmer plate, open up the valve at the pump and blow the line clear from the skimmer side. When clear I add about 4 gallons of antifreeze for good measure and quickly bump the blower to push thru line. Install skimmer protector plug and pour another gallon of antifreeze in skimmer. The returns I blow out from the pump side. Close valve and hook up blower vac. Turn on vac and open valve. Air will take path of least resistance, the closest return. When it is going like ole faithful I install a 1 1/2" plug and move to next one. When I get to last one I use a one way valve plug. When it blows tons of air I repeat the antifreeze trick and move on.

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    30x20 vinyl IG, Hayward SD60 with Pentair Dynamo 340219 2HP pump, Compupool CPSC24 SWG, Hayward H200FDN heater. APC automatic pool cover.
    Central Illinois

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