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Thread: DE Filter Servicing?

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    Join Date
    Feb 2014
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    Leander, TX
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    DE Filter Servicing?

    I'm having a tough time searching the forum, so if I'm missing a thread, my apologies.

    I've got a Pentair DE filter. I do not know how often I should be backwashing, how much DE to put back in the water after backwashing and how often to clean the filters.

    Again, sorry if this has been hashed many times....
    23k gal IG pebble, 48 sq ft Pentair FNS Plus DE filter (FNSP 48) 96 GPM, 1.5 HP WhisperFlo pump, Kreepy Krauly Legend Robot.
    Pool was built in 2011, in Central Texas (Leander, TX)

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    JasonLion's Avatar
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    Re: DE Filter Servicing?

    The amount of DE to add depends on the specific filter you have. For an FNS+ 48 it is 4.8 lbs when the filter is fully cleaned out, and 80% of that after backwashing.

    You want to backwash the filter when the filter pressure gauge goes up 25% above the freshly recharged filter pressure.
    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

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    Feb 2014
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    Re: DE Filter Servicing?

    I think it's probably time to clean the filters...never done that either Guess that will be a learning process....
    23k gal IG pebble, 48 sq ft Pentair FNS Plus DE filter (FNSP 48) 96 GPM, 1.5 HP WhisperFlo pump, Kreepy Krauly Legend Robot.
    Pool was built in 2011, in Central Texas (Leander, TX)

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    Mod Squad jblizzle's Avatar
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    Re: DE Filter Servicing?

    I just tore my DE filter apart today and took a lot of pictures for a tutorial ... although who knows when I will get that done and posted. If you have questions, post them up.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
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  5. Back To Top    #5
    Mod Squad jblizzle's Avatar
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    Re: DE Filter Servicing?

    My DE tutorial is now available here: http://www.troublefreepool.com/threa...aning-Tutorial
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

  6. Back To Top    #6

    Join Date
    Feb 2014
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    Leander, TX
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    Re: DE Filter Servicing?

    Thx Jblizz...I may give this a shot
    23k gal IG pebble, 48 sq ft Pentair FNS Plus DE filter (FNSP 48) 96 GPM, 1.5 HP WhisperFlo pump, Kreepy Krauly Legend Robot.
    Pool was built in 2011, in Central Texas (Leander, TX)

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