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Thread: Maintenance of cartridge end caps and DE, Pentair

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    susa's Avatar
    Join Date
    Oct 2010
    Deep South

    Maintenance of cartridge end caps and DE, Pentair

    Pentair Clean & Clear cartridge filters contain these black end cap inserts on both sides of the cartridge (top,bottom).

    When these cartridges are cleaned, is it necessary to remove these 2 end caps?

    Also read for the first time this blurb from the owners manual:

    When the cartridge element filter is used on new pools and after cleaning the elements, introduce into the system .5 pounds
    of diatomaceous earth per every 100 square feet of filter area, (a one-pound coffee can equals .5 pounds of diatomaceous
    earth). Mix the diatomite with water and pour it into the skimmer after the pump is primed and the system is operating. This
    will enhance the filtration of your water.

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    Join Date
    Feb 2008
    Flower Mound, TX

    Re: Maintenance of cartridge end caps and DE, Pentair

    I will remove the caps on the top but I'll leave the bottom ones in place as I haven't seen any reason to remove them as of yet.

    That's the first that I have heard of adding DE to a cart filter system. I personally wouldn't do it, but that's just me.
    10K gallon IG gunite with waterfall; Pentair CC320P filter; WhisperFlo 2 HP pump
    TF Test Kits - Pool Math - Pool School
    "It depends."- JohnT

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    frustratedpoolmom's Avatar
    Join Date
    May 2007
    SWSuburban Chicago, IL

    Re: Maintenance of cartridge end caps and DE, Pentair

    I have heard of certain manufacturers/models recommending DE for their system, but it's not a general recommendation for all carts and in fact can ruin some. If your owners manual recommends it any harm that might arise should be covered under warranty if the system is new. If this isn't a new one I wouldn't bother.
    Helpful links: Pool School; CYA/Chlorine Chart
    24' round AG pool, 52" high, Raypak heater; Waterway 2 spd Pump;
    150 Sq ft. Clearwater Cartridge Filter; Former and DISSATISFIED "Pool Frog" owner

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