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Thread: D.E. won't coat grids

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    D.E. won't coat grids

    I just hooked up a new Hayward EC40 filter to my 16x32 above ground pool. After bleeding all air and adding DE, 4 pounds my pressure was reading 0. I gave it a few minutes and no rise in pressure. Water is returning to pool at what seems to be a normal rate compared to previous years. I was afraid the DE had not coated the perplex tubes so I removed the cover to the filter and all de was sitting at the bottom of the filter. I cleaned it all out and retried. Same results. Pressure equals 0 still. What is going on? Please help
    23,000 gallon gunite with waterfall, radiant heat, sta rite system 3 cartridge filter 450 sq. ft., 1 1/2 HP

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    Mod Squad JohnT's Avatar
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    Re: D.E. won't coat grids

    Any chance the plumbing is reversed?
    TFP Moderator
    20K Gallon 20X36 Vinyl Inground
    Hayward S244T Sand Filter with 1HP Whisperflo Pump. Liquidator C-201 and Solar Heat

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    Re: D.E. won't coat grids

    From skimmer to pump thru union connection to filter out the top of filter and straight to pool
    23,000 gallon gunite with waterfall, radiant heat, sta rite system 3 cartridge filter 450 sq. ft., 1 1/2 HP

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    Mod Squad Bama Rambler's Avatar
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    Re: D.E. won't coat grids

    Welcome to TFP.

    Tell us more about your pool and equipment?
    Is your bump handle operating like it should?
    Is it in the up position like it should be?
    What size pump do you have?
    Is it a 2-speed pump?
    Can you post a pic of the pad?
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

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    JasonLion's Avatar
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    Re: D.E. won't coat grids

    The gauge might be broken. Those pressure gauges aren't all that reliable. Even without DE on the grids I would expect to see a few PSI.
    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

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    Re: D.E. won't coat grids

    It is possible to have a bad gauge. It is brand new. I will get a new one and see how that works. Later this afternoon I will post more specs regarding my pool equipment. Just dont understand how the DE wont coat the grids. Thanks for the help so far.
    23,000 gallon gunite with waterfall, radiant heat, sta rite system 3 cartridge filter 450 sq. ft., 1 1/2 HP

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