Filter system question

shootnparApril 21, 2012


I currently have a Sta-rite system 3 filter system, but am looking to replacing it. I'm looking for something that is more energy efficient, and where the replacement filters alone, don't cost as much as the whole system. I have a salt water pool, and the new filter should be compatible with my current Jandy box for programming, etc.

Any suggestions, I like the filter type, but the filters run around $400 minimum to replace, but maybe theres a better system, same type, that is more cost friendly.

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Filters are passive devices as far as your automation and chlorination system.

How old are your cartridges and what makes you sure they need replacing?


    Bookmark   April 21, 2012 at 5:23PM
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The Sta-Rite System 3 cartridge filter has the lowest head loss of any filter on the market so you really can't get more efficient than that filter. However, you shouldn't need to replace them that often either. Besides Scott's questions, what model pump do you have?

    Bookmark   April 21, 2012 at 8:38PM
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If D.E is not a problem in your area for backwashing I would look at the Pentair FNS plus with a Multiport valve. This is what I have on my personnel pool with a IntelliFlo Variable Speed pump and I do a tear down clean the grids once a season and may backwash it twice a season if that much and thats because of pine trees near my pool. I have installed these filters in almost every build also over the last 6 years.


Here is a link that might be useful: Pentair

    Bookmark   April 22, 2012 at 9:25AM
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The FNS plus with a 2" backwash valve will have about 4.5x the head loss as the OPs current filter so not very energy efficient. But then again, most sand and DE filters are not very energy efficient because of high head loss.

    Bookmark   April 22, 2012 at 2:03PM
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Well then go with the Quad DE

Here is a link that might be useful: Quad

    Bookmark   April 22, 2012 at 2:36PM
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The Quad DE is a little better but still over 3.5x the head loss of the current filter. If you leave off the backwash valve it is only 1.5x the head loss so the backwash valve adds a lot by itself.

    Bookmark   April 22, 2012 at 3:19PM
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The DE filters run a little more but being able to backwash and not have to clean the cartridges is a big plus and I have customers that are running the same grids for over 6 years. This combined would make the homeowners Pool maintenance costs off set I.M.O.

    Bookmark   April 22, 2012 at 8:17PM
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