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Thread: CYA causing pressure to go up, low flow?

  1. Back To Top    #1

    Join Date
    Jun 2014
    Wayne, NJ

    CYA causing pressure to go up, low flow?

    Hello, I have a Hayward sand filter, 24' above ground pool. I opened the pool and my CYA was 0. 2 weeks ago I added a gallon of liquid conditioner hoping to get my CYA levels up, checked it again this morning and it was still at 0. I proceeded to add a few pounds of the granular to my skimmer. Everything went through to the filter but all day my pressure shot up and there is barely any flow from the return. Is this normal with CYA, I know I can't do a backwash for a while, but what do I do now that there is no flow from the return? Thanks
    14,600 gallons, 24' Round
    Sand Filter
    Above Ground

  2. Back To Top    #2
    Richard320's Avatar
    Join Date
    Jan 2010
    San Dimas, CA (LA County)

    Re: CYA causing pressure to go up, low flow?

    You just have to wait for the granules to dissolve and stop clogging the filter and things will go back to normal. Or you backwash and lose all the granules you just bought. There is no middle ground.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

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