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Thread: Add DE after replacing an O-Ring?

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    Add DE after replacing an O-Ring?

    Quick question. I have a Hayward DE4820 Pro-Grid and it was leaking out of the MAR assembly. I just got the two O rings I need and hopefully that will do the trick. My pool was up and running for a week until I needed this fix and another. I emptied the water out of the Pro-Grid through taking out the bottom screw cap to do these fixes. The filter grids still look to be coated with DE. The question is: do I need to wash out all of the DE and start over, or can I replace the O rings, put the filter back together and start up the pump as normal without adding any more DE? Thank you.

    Chad

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    Mod Squad jblizzle's Avatar
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    Re: Add DE after replacing an O-Ring?

    When was the last time you did a full tear down and grid cleaning? If you have not done it this year, I would do that and start fresh.
    Jason, TFP Moderator
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    Re: Add DE after replacing an O-Ring?

    I soaked the grids in powdered dish washer soap and washed it a couple of weeks ago before I opened the pool. Just looking to save some time and DE if I can.

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    Mod Squad jblizzle's Avatar
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    Re: Add DE after replacing an O-Ring?

    Ah, yeah then a full cleaning would be overkill.

    Did you see much DE come out when you drained the filter? If not, I might just let it ride.
    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
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    Re: Add DE after replacing an O-Ring?

    Some was definitely in the water, but the grids themselves are caked. Thank you for the advice!

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