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Thread: Can I run TWO filters?

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    Can I run TWO filters?

    Currently we have a Hayward S244T (3.14 sq.ft.) Sand Filter on a 27k gal. pool. It didn't do a very good job last season. Recently the board recommended that the proper filter would be at least 5 sq.ft. So I'm wondering, since I have an identical S244T filter on hand (never been used) could that be plumbed into the circuit and give the same improved performance as going out and spending $600 on a bigger filter. Where the pump outputs the water I would just put a T that would route 1/2 the water into the second filter. Do you see any problem with putting the output of the second filter into the return line with another T, ie. would that cause back pressure into filter#1?

    Thanks for any input any of you might have.

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    JasonLion's Avatar
    Join Date
    May 2007
    Silver Spring, MD

    Re: Can I run TWO filters?

    As long as the filters are the same as each other you can plumb them in parallel, as you describe, and it will work. The disadvantage is that you now need to backwash and maintain two filters instead of just one.
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    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Tucson, AZ

    Re: Can I run TWO filters?

    I would actually suggest maybe using a 3 way valve to split to the 2 filters and have a check valve off of each one before they merge or another 3 way. Then you could isolate each one if necessary for repairs and keep running the other. Or isolate for higher flow backwashing individually.

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    Re: Can I run TWO filters?

    Wow, that's a great idea, having that extra pressure for backwashing. Thx for all your help!

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    mas985's Avatar
    Join Date
    May 2007
    Pleasanton, CA

    Re: Can I run TWO filters?

    Quote Originally Posted by ekbishop1
    It didn't do a very good job last season.
    Exactly what does this mean?

    Having two filters may not solve the problem depending on what it is.
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  6. Back To Top    #6

    Re: Can I run TWO filters?

    You can add some DE to your sand for a little finer filtration. 2 filters will extend the time between back washing, cut some head pressure but I think the particle size of the filtration will remain the same.
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    In the Industry

    duraleigh's Avatar
    Join Date
    Apr 2007
    Sebring, Florida

    Re: Can I run TWO filters?

    It didn't do a very good job last season.
    I'm with mas985....2 filters may not have anything to do with your issue. What problems were you having?
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
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