Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 4 of 4

Thread: Backwashing

  1. Back To Top    #1

    Join Date
    Jul 2007
    Location
    Katy, TX
    Posts
    188

    Backwashing

    We have a quad DE filter. The directions say to backwash filter when the psi gets to 10 above the start up number (hope that makes sense). Ours never does. It only moves 2-3 psi above. How often do most people backwash. I know this would depend on pool maintance but I have no clue when we should be doing this. Also, you know the "eye" things on the equiplment? What is that there for? Is it suppose to tell you something? Lord, I sound like a complete idiot. We just backwashed 2 eeks ago b/c our pool was hit with serious construction waste from a patio we put in. That eye ball is green now although my water looks okay and my numbers are all with in range. I have been seeing this yellow stuff on the walls of the pool which I thought might be pollen but I will post in the algea section. TIA!
    ~Andrea

    24,000 IG with spa and 4 ton waterfall. Equipment: Pentair 520 Clean & Clear, Pentair VS+SVRS Intelliflo, Pentair Whisperflo 2 HP, Polairis Cleaner, Intellibrites, Pentair Rainbow 320 in-line Chlorinator, Pentair Easy touch 8 wireless and spa side remote.

  2. Back To Top    #2
    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,887
    The quad DE filter is a large filter and you have a reasonably sized pool so you won't need to backwash the filter very often. You should backwash/clean the filter at least once per year regardless.

    What is the clean filter pressure?

    By "eye" do you mean a clear section of pipe? There is usually a clear section of pipe that allows you to tell when it is time to stop backwashing.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

  3. Back To Top    #3

    Join Date
    Jul 2007
    Location
    Katy, TX
    Posts
    188
    I just took these:


    This is what it typically stays at, a couple psi above the start.

    This is the ye ball I was atlking about:



    See how it is green? Like I said, we just backwashed a couple weeks ago. DH cleaned the filter about 6m ago. Thanks for all your help!
    ~Andrea

    24,000 IG with spa and 4 ton waterfall. Equipment: Pentair 520 Clean & Clear, Pentair VS+SVRS Intelliflo, Pentair Whisperflo 2 HP, Polairis Cleaner, Intellibrites, Pentair Rainbow 320 in-line Chlorinator, Pentair Easy touch 8 wireless and spa side remote.

  4. Back To Top    #4
    skinsfan44's Avatar
    Join Date
    Jun 2007
    Location
    Toms River, NJ
    Posts
    21
    I usually get crud in the bulb after backwashing too. However, a quick rinse right after backwashing clears it right up. Did you rinse after you backwashed?
    - 18 x 36 Inground with Vinyl Liner
    - 30,000 Gallons
    - Pentair Clean and Clear 420 with a 1HP Pentair Whisperflow
    - Blue Diamond Robot Cleaner

Posting Permissions

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