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Thread: Filter lifespan - Buy new grid cartridge or buy new filter?

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    Filter lifespan - Buy new grid cartridge or buy new filter?

    Here is my situation. I have an 8 year old Sta-rite SMD S7MD60 DE filter, and recently DE and dirt began being blown into the pool returns on occasion. Upon inspection of the DE grid cartridge, I noticed several tears that will require a new grid cartridge. Unfortunately this old Sta-rite model did not have individual grids, but rather had one large cartridge that included all 60 sq. feet in one cartridge. I have found the cartridge online with a best price of ~$260. I have also priced new filter systems at around $600. I am torn between which option makes the most sense. My two questions below are:

    1. If I replace the DE grids on my current filter for $260, how many more years of reasonable life can I expect out of my existing filter housing and backwash valve? I have the unit shaded from the sun, but at the same time it is 8 years old. Any replacement parts going forward will be very expensive.

    2. What kind of life expectancy can I expect on a new filter? I am actually looking at getting a Hayward sand filter as dealing with this DE has been kind of a nightmare.

    3. Given my scenario of $260 for a replacement cartridge now vs. $600 for a new filter, which option would you recommend?

    Thanks all for the help!

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    Join Date
    May 2007
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    South Central NJ
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    Re: Filter lifespan - Buy new grid cartridge or buy new filt

    Grids should last, when properly cared for, between 5 to 10 years. Your filter isn't that old. I would just replace the grids.

    Scott
    Owner of - PoolGuyNJ LLC
    Expert Pool and Spa Repairs, Renovations, and Augmentation. Helping people decide what is the right gear for meeting their needs. Expectations Set, Expectations Met, No Surprises.

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    Re: Filter lifespan - Buy new grid cartridge or buy new filt

    More than the price difference, it seems like you have had issues with the DE. A new grid cartridge may not alleviate that.

    DE works fine for many, many people but if there is something that doesn't make it right for you, I would switch to sand.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: Filter lifespan - Buy new grid cartridge or buy new filt

    Thanks for the feedback guys. I really appreciate it. It helps knowing my filter has some life left in it. I think I will just replace the DE grid. My "nightmare with DE" was just more to illustrate that if I was going to go with a new filter I would lean more towards sand.

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