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Thread: Draining to lower CYA.

  1. Back To Top    #1

    Join Date
    Jun 2014

    Draining to lower CYA.

    My CYA is pretty high (150ish). I want to drain off a bunch of water and refill, but I'm not sure if I can drain to below the skimmers without getting air in the lines and having problems. If I close the valve for the skimmers and backwash water out only coming from the main drain will I be OK? Any problem if I drain to a little below the returns, or should I keep the water level just above the returns?
    Thanks in advance for the advice!
    25,000 gallon inground plaster pool with attached spa. Sand filter.

  2. Back To Top    #2
    Melt In The Sun's Avatar
    Join Date
    Oct 2009
    Tucson, AZ

    Re: Draining to lower CYA.

    If you can pull from just the main drain, that should work fine. I've emptied my entire pool that way!
    11,200 gal, Pebble-Tec; Tristar 2-speed 1hp - Swimclear 325 ft2 cart - SWG - A & A in-floor cleaner - Heat pump. For the poolside cooking, a Yoder Wichita and a Big Steel Keg!
    TF Test Kits -- PoolMath -- Pool School
    Make each day your masterpiece. - John Wooden

  3. Back To Top    #3

    In the Industry
    duraleigh's Avatar
    Join Date
    Apr 2007
    Sebring, Florida

    Re: Draining to lower CYA.


    +1 what MITS said.

    We are on a roll to get everyone to enter their city and state in their profile. The climate often affects our suggestions. Would you enter yours, please?

    Dave S. - Forum owner
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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