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Thread: Normal for this much DE in bottom of filter?

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    Join Date
    Jan 2014
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    The Woodlands, TX
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    Normal for this much DE in bottom of filter?

    Took mine apart to clean today. Drain plug is very hard to reach, so shop-vacced out the standing water in filter housing.

    Is it normal to have about 10-12" of sludge in the bottom? Seemed like it was mostly DE.....pretty thick after sucking out the water.

    Just wondering if it had been over DE'd last time.
    Brad

    15,000 gallon IG plaster with attached spa. Full Pentair EasyTouch system. IC40 SWG. TFT-100

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    Mod Squad jblizzle's Avatar
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    May 2010
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    Re: Normal for this much DE in bottom of filter?

    Not uncommon. Which is why a full tear down is recommended yearly. Backwashing just does not work very well.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
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    chiefwej's Avatar
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    Jun 2011
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    Re: Normal for this much DE in bottom of filter?

    Each time you turn off the pump, much of the DE drops off of the grates in the filter to the bottom, when the pump comes back on it swirls around and is redeposited on the grates. Naturally when you tear down the filter you find a lot of DE in the bottom.
    chiefwej
    Tucson, AZ
    16x36 rectangular (19k) Pebble Tec play pool/spa, Pentair Intelliflo VS 011018, Super II 2hp (spa), Aqua Rite T-15 SWG, Pro Grid 60 DE, Hayward H400 & Heliocol Solar heating, A&A infloor system, fill water w/high CH and TA, 50 ppm borates,TF-100 test kit

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