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Thread: Drain and refill in the summer?

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    Join Date
    Jun 2015

    Drain and refill in the summer?

    I have stumbled across this site after foolishly following my local pool stores instructions since moving into my home 2 years ago. I am in the Phoenix area and I get the feeling that most people here are floating Trichlor and using bagged shock at the instruction of the local pool store. I drained and refilled my pool 18 months ago and am now beginning to understand why my CYA is pushing 150+ (per local pool store reading) and why I cant' keep chlorine in my pool.

    I understand that I need to get a proper kit to maintain my pool moving forward (ordered the TF-100), but what my question is should I even attempt to drain my pool and refill in the summer? I am seeing highs of 107 degrees already and I am not sure it is safe to drain and refill like I need to to get to a CYA level that will allow me to maintain my chlorine levels.

    I also intend to switch to liquid chlorine for my primary chlorine source as the tabs may be convenient, but I don't enjoy draining my pool yearly.
    13,500 Gallon, In Ground, Pebble, Hayward Micro Clear DE-6000 Filter, Hayward Northstar 1.5HP single speed pump, all original from 1998, city water supply, Rock waterfall. TF100 Test Kit.

  2. Back To Top    #2
    Charlie_R's Avatar
    Join Date
    May 2013
    Mexico, MO

    Re: Drain and refill in the summer?

    Welcome to the forum!

    Look around the forum, there are several threads dealing with a simultaneous drain and fill, which in your case would be a good idea to reduce the risk to your plaster.

    Basically these methods involve either draining from the bottom and filling from the top, or using a large sheet of plastic to keep the old and new water somewhat separated.
    15'x48" 4500 gallon Intex pool, buried 1.5 ft. Pac-Fab Dynamo 3/4 hp pump. Hayward S180T sand filter, bought used. Taylor K-2006 test kit. Rocket mass heater based wood fired pool heater.

  3. Back To Top    #3
    jrs_diesel's Avatar
    Join Date
    Aug 2014
    League City, TX

    Re: Drain and refill in the summer?

    We did a drain and fill last August when we moved in on our plaster pool. Do you know where your water table is at (depth)? That will play a factor into draining and filling.

    I think in your area there you may have the reverse osmosis treatment option. That will bring down your CYA level (and CH) while only draining some of the water, far less than doing a drain/fill.

    20K IG gunnite pool
    2HP Hayward single speed pump
    Cartridge filter

  4. Back To Top    #4
    Mod Squad Texas Splash's Avatar
    Join Date
    Jun 2014
    South-Central Texas, Marion/San Antonio

    Re: Drain and refill in the summer?

    Welcome Viper. Once your TF-100 comes in (great decision by the way), post some accurate numbers of your own so your TFP friends can give you some specific guidance. Who knows, maybe your CYA isn't quite as bad as you think, but if it is, we'll get you through it. You wouldn't be the first person who fell victim to years of bad pool store advice.
    Pat (a.k.a. Texas Splash) ~ My Pool: Viking Fiberglass; 17,888 Gal; Waterway Supreme 2-sp/2-hp pump; Hayward Ctg filter; TF-100 w/ Speed Stir
    If you enjoyed your TFP experience, please consider donating to Support TFP!

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