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Thread: Filter question

  1. Back To Top    #1

    Join Date
    Jun 2009
    Location
    Middle Tennessee
    Posts
    4

    Filter question

    I just replaced my old waterway filter and pump with a new Hayward set and hard plumbed it with PVC. I am having something happen now that also happened with my old filter and pump. At first, the return is going strong but after a few hours the return slows way down. The pressure on the gauge goes down after I backwash it a minute and then rinse and the water from the return goes back to what it was. Any ideas? Thanks.
    27' x 54" AG with approx. 17,100 gallons and vinyl liner
    Located in middle Tennessee
    2 hp sand filter

  2. Back To Top    #2
    Richard320's Avatar
    Join Date
    Jan 2010
    Location
    San Dimas, CA (LA County)
    Posts
    18,768

    Re: Filter question

    If this is the sequence:

    Normal pressure, good flow> Higher pressure, low flow> backwash> normal pressure, good flow> Higher pressure, low flow> backwash> normal pressure, good flow> Higher pressure, low flow> backwash> normal pressure, good flow...

    That's normal. It means the filter is clogging with debris. That's what it's supposed to do. If it's something other than what I describe, please lay it out in sequence with pressure and flow.

    If the pool is cloudy or green, that means algae, and no matter how much you filter out, more will grow to replace it and give you a neverending supply and endless filter clogging.
    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!

  3. Back To Top    #3

    Join Date
    Jun 2009
    Location
    Middle Tennessee
    Posts
    4

    Re: Filter question

    It is exactly as you describe it. So no real worries then? I can see the bottom and it isn't green but it was nasty to begin with this spring. The pump broke last year and everything basically just sat most of last summer and winter. The frogs LOVED it! Got it mostly clear with a new pump except for this gross white stuff that started floating on top. I couldn't decide if it was mass frog eggs or slime mold but it looked like a T-Rex sneezed on my pool. It rained really hard and it had no filtration while I replaced the equipment and the snot finally went away. The old pump and filter got to where it would only last for 5-10 minutes at a good flow before it would need to be backwashed so that is why I got a new set. I knew if I got in there to change the sand, and something was broken, It would set again while I waited on new equipment and I didn't want that. Thank you soon much for responding so quickly. You have relieved my mind and I can quick freaking out now!
    27' x 54" AG with approx. 17,100 gallons and vinyl liner
    Located in middle Tennessee
    2 hp sand filter

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