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Thread: Why Does My DE Filter Lose Pressure

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  1. #1
    Join Date
    Dec 1969
    Location
    Baltimore, MD
    Posts
    17

    Default Re: Why Does My DE Filter Lose Pressure

    First, thank you for taking the time to help me. You are correct, I"m using a red 16oz cup. I've already ordered a DE Scoop cup last night. For now, is there an easy to way to figure out how much DE i need using my plastic cup?

    Also, how do I run the pump on high speed? I know there are main drains and skimmer drains. I do have 2 pipes coming into my pump and 2 going back out. But they are not labeled. I assume I need to shut off the main drain and do only skimmer and that would run my pump on high speed? I'm trying to insert a pic but I can't figure out how.
    48x14 rectangle in-ground concrete pool, 29k gallons, Taylor K-2006, 8.25% Clorox
    DE Filter Pentair FNS Plus FNSP60 (filter area – 60 sq ft, GPM 150, diameter 21.5”, turnover capacity 86,400 per 12 hours)
    Pump 1HP Pentair WhisperFlo high performance
    SWCG Zodiak LM3-24 (24 grams of pure chlorine per hour)
    Booster Pump Polaris Halcyon PB4-60Q

    "No pool store junk goes in my pool"

  2. #2
    Join Date
    Jul 2013
    Location
    Northern Illinois
    Posts
    817

    Default Re: Why Does My DE Filter Lose Pressure

    How is it going?
    26K gal 20x40 rectangular IG vinyl pool; Apr 2014: New pump, liner, auto-cover, & water; Pentair Whisperflo 1HP pump; Pentair Trition sand filter; Cover/Star CS-500 auto cover; Taylor K-2006C; OTO

  3. #3
    Join Date
    Dec 1969
    Location
    Baltimore, MD
    Posts
    17

    Default Re: Why Does My DE Filter Lose Pressure

    turns out it must have just been a dirty pool. Pressure seems to hold steady at 20psi now. Lesson learned here though is that a dirty pool may require a backwash every 2 hours or so. Seems to be pretty normal.
    48x14 rectangle in-ground concrete pool, 29k gallons, Taylor K-2006, 8.25% Clorox
    DE Filter Pentair FNS Plus FNSP60 (filter area – 60 sq ft, GPM 150, diameter 21.5”, turnover capacity 86,400 per 12 hours)
    Pump 1HP Pentair WhisperFlo high performance
    SWCG Zodiak LM3-24 (24 grams of pure chlorine per hour)
    Booster Pump Polaris Halcyon PB4-60Q

    "No pool store junk goes in my pool"

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