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

Thread: IntelliFlo VF and when to backwash

  1. Back To Top    #1

    IntelliFlo VF and when to backwash

    I have an IntelliFlo VF and Quad DE 100 filter on my 32K gal pool. Definitly oversized for my pool... but was hoping to go longer between backwash. Right after plastered and filled I was running it on highest speed and saw the pressure on filter go up and time to backwash... but now that I have it on regular cycle, 50 gpm, the pressure never seems to go up. For a variable speed pump, what is the proper flow rate to assess filter pressure drop? Do I need to run the pump on a short cycle at higher rate to properly evaluate filter backwash time? On average, how often should I need to backwash? 1 week? 2 weeks, etc? Also, aside from backwash, how often should I have to actually take the filter apart and clean the 4 cartridges inside?
    32K gal, gunite, French Gray DB, IntelliFlo VF, IntelliFlo, WhisperFlo, Quad DE 100 filter, IntelliTouch, IC-60 SWG, IntelliChem, Dolphin M5

  2. Back To Top    #2
    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,879

    Re: IntelliFlo VF and when to backwash

    The key thing is to always use the same speed (in RPM). Also, it shouldn't be too low of a speed, try at least 2000 RPM. If you are using a flow rate based speed, the pump can tell you when it is time to backwash.

    The first week or two with a freshly plastered pool tends to involve lots and lots of plaster dust, which can clog the filter fairly quickly.

    Once everything settles down, and assuming you don't get algae, you should only need to backwash/clean the filter two or three times per season.
    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

    Re: IntelliFlo VF and when to backwash

    Cool... that makes sense.... my PB did the first backwash on day 2 after plaster... tons of junk and the pressure was up. I did it about 4 days later... now over two weeks have passed and the pressure has not gone up... flowing 50 gpm. I just wanted to make sure I did not have a bad gauge. Is it recommended to install additional gauges on the input side of the tank inline? If so, is there one that works best?
    32K gal, gunite, French Gray DB, IntelliFlo VF, IntelliFlo, WhisperFlo, Quad DE 100 filter, IntelliTouch, IC-60 SWG, IntelliChem, Dolphin M5

  4. Back To Top    #4
    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,879

    Re: IntelliFlo VF and when to backwash

    One pressure gauge is plenty. There are some nice oil filled gauges available, but they are a couple of times as expensive and most people just go with the stock gauges.
    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

Posting Permissions

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