Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 3 of 3

Thread: Return flow decreasing, but PSI only increasing by 4 or so??

  1. Back To Top    #1

    Return flow decreasing, but PSI only increasing by 4 or so??

    I started running the filter this morning, and have blueish, cloudy water, with a BUNCH of small particles in the pool. I can't see the bottom, but I can see shadows where leaves are settling. Basically when we took the cover off there was a hole in it and green, nasty water went in the pool. I've been getting leaves out all day and I believe I've made a pretty good dent in them because the brown shadow they are creating on the bottom is getting smaller. I share all this to set the stage for my question--psi on my filter is running about 15 and has not risen more than 4 all day, but the return flow decrease to about half over a 2-3 hour period. I can backwash and the return flow goes back to normal. The pool is skimming, but since the stuff in the pool is so small I not sure I can gauge how well. What are your thoughts? I confess I have backwashed to get the return flow going again, but now I am rethinking that.
    24foot AGP
    13, 500 gallons
    Hayward sand filter/2 speed with timer
    and yes I'm testing with a Taylor!

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

    Re: Return flow decreasing, but PSI only increasing by 4 or

    That's normal. The filter is doing what it's supposed to do. And you're backwashing when it slows down and pressure increases 25%, which you're supposed to do. I see no problem.

    Since you've been scooping out the leaves all day, may I suggest some Motrin? Or perhaps some sort of liquid painkiller?
    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

    Re: Return flow decreasing, but PSI only increasing by 4 or

    ah...25% increase...I was looking for an increase of 6-8 psi. Yea, I remember reading about 25%, but I got the other numbers stuck in my head. And I've had my liquid painkiller for the day, but I might need to move on to some Motrin as you suggested.
    24foot AGP
    13, 500 gallons
    Hayward sand filter/2 speed with timer
    and yes I'm testing with a Taylor!

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •