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

Thread: Filter diagnosis

  1. Back To Top    #1

    Join Date
    Jun 2012
    Location
    Bolton Ontario Canada
    Posts
    45

    Filter diagnosis

    Hi all, I suspect my sand filter may be channeled or at least not working as well as it should. This is my second full year with the pool. Water is great, everything is fine, but I have a few symptoms that are bugging me. First some background:

    Pool is about 25-30 years old. I moved i ntwo years ago. I have no idea if filter is original or not, I replaced pump last year.
    Assumption - minimal maintenance has been done, based on previsous owner's way of handling other things with the house.

    Here are my symptoms:

    1.Filter pressure almost never moves. Last year ran at 15 PSI, this year about 12.5 when filtering, but stays pegged there. I backwash every month or so maybe, give or take anyways, even though Isee no pressure rise. (gauge is not broken)
    At times, filter pressure after a backwash would increase by 1 psi AFTER a backwash (opposite if what it should do). this year, it goes unchanged after I backwash.

    2. When manually vaccuming, I get some particles returning to the pool throught the jets. Big enough that I can see them, but not a steady stream or anything. After I finsh a lap of vacuuming, there isa new deposit under the returns.

    Thinking of opening it up and cleaning, but not sur eI want to tackle that....any thoughts?

    Thanks!
    16x32 vinyl
    80,000L chlorine
    21" Hayward 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 diagnosis

    Do it! And take pictures all along the way. We need an illustrated how-to.
    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 2012
    Location
    Bolton Ontario Canada
    Posts
    45

    Re: Filter diagnosis

    Well I took it all apart and was surprised how clean it was inside. Took the valve apart too, and didn't see any obvious sign of any issues. This filter is original, pushing 30 years. so since I couldn't find a problem, I just bought a new Hayward filter. No longer have dead algae/dirt and debris settling back on the floor 24 hours after I vacuum.
    16x32 vinyl
    80,000L chlorine
    21" Hayward sand filter

Posting Permissions

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