O ring for Hayward 4820

Hi

replacing the o ring on my DE Hayward 4820 with filter filaments.  What is exact part number of the o ring? I see so many different versions online.

thank you

shamim

Hello Shamim - The replacement tank o-ring for the Hayward DE4820 is part number 4820-02. You can view all of the available items on our Hayward ProGrid filter parts page.

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I also need to replace the filter grids.  Is there specific dimension for the filaments? Height, etc?

The grid set for the DE4820 is part number FG1004PACK. The pack includes seven full and one partial grid.