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Thread: Replacing sand filter with cartridge

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    Replacing sand filter with cartridge

    I have decided to replace our sand filter ( it is old and leaks a bit around the pressure gauge ) with a cartridge filter.

    I am doing a lot of reading on how to size it and want to get some feed back and a bit of help.

    Relevant info:

    - in ground pool, vinyl liner
    - salt water generator
    - 12,000 gallons ( best estimate )
    - 3/4 horse pump
    - current plumbing is all 1.5"

    I found an article that suggests that I need between 100 sq ft and 200 sq ft of filter area for a pool/pump this size.

    What I found that seems to match this is: http://www.poolplaza.com/P-HAY-05-162.html which is a Hayward Star-Clear Plus Cartridge Filter , 120 Sq. Ft., 2 FIP (C12002).

    Does anyone have experience with this filter and or see an error in my approach?

    Cheers!
    Jim -Nebraska
    12,000 Gallon, Vinyl In Ground
    Filter Flow Rate 120GPM, 3/4 HP pump
    Pool Built 1973

  2. Back To Top    #2
    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
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    37,879

    Re: Replacing sand filter with cartridge

    I recommend getting the largest filter you have room for and can afford. Larger filters can go longer between cleanings and just slightly improve the efficiency of the plumbing system.

    My pool is not quite twice as large and my filter is not quite twice as large and I certainly wish that there had been more room on the equipment pad so I could have gotten a larger filter.
    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

  3. Back To Top    #3

    Re: Replacing sand filter with cartridge

    Hi Jason - Thank you for your timely comments. I bumped the size of the filter up to 175 sq ft. I ended up getting a Hayward Star Clear. I am looking forward to retiring our old filter.
    Jim -Nebraska
    12,000 Gallon, Vinyl In Ground
    Filter Flow Rate 120GPM, 3/4 HP pump
    Pool Built 1973

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    frustratedpoolmom's Avatar
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    May 2007
    Location
    SWSuburban Chicago, IL
    Posts
    11,965

    Re: Replacing sand filter with cartridge

    Reconsider? Or at the very least - get a multiport or a valve that can bypass the filter and allow recirculate and backwash settings - trust me you will miss that aspect of a sand filter if you eliminate them.
    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
    http://www.PerfectlyClearPoolService.com

  5. Back To Top    #5

    Re: Replacing sand filter with cartridge

    hi frustratedpoolmom - we live in nebraska and have the pool closed for more months than it is open. when we pull off the cover in the spring it is very icky. to that end we will install a "waste" valve that allows us to pump directly out of the pool onto the ground. it sounds awful to do this but the leaves and junk are impossible to "filter" out otherwise.

    I am not sure how I would use a recirculate.

    Having given up my money I think I am pretty much in for the long run with the cartridge. I will report back on frustrations. I am hoping that filter cleanings are no more than monthly once we get rolling.
    Jim -Nebraska
    12,000 Gallon, Vinyl In Ground
    Filter Flow Rate 120GPM, 3/4 HP pump
    Pool Built 1973

  6. Back To Top    #6
    frustratedpoolmom's Avatar
    Join Date
    May 2007
    Location
    SWSuburban Chicago, IL
    Posts
    11,965

    Re: Replacing sand filter with cartridge

    As long as you have a vac to waste feature to bypass the cartridge its better than nothing! Good luck
    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
    http://www.PerfectlyClearPoolService.com

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