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Thread: Sizing...

  1. Back To Top    #1

    Join Date
    Aug 2014
    Location
    Mesa AZ
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    54

    Sizing...

    I'm considering a SWG for my 30k plaster pool, but it seems most of the mainstream models top out at 40k gallons. I'd like to get the Aquarite I think just because it's ubiquitous.

    Seems like the next step up to the 60k cell systems will cost me several hundred more but people seem to recommend going over-sized 1.5-2x. Would I be OK with a 40k cell on a 30k (well, 27-33k, somewhere in there ) pool?

    Also - I'm in Phoenix and have a small to moderate swimmer load in the summer.
    30k plaster pool
    Pentair 011018 IntelliFlo, Pentair CCP520, IC40 SWG, IntelliPH Acid system
    Easytouch 4 + ScreenLogic2

  2. Back To Top    #2

    Join Date
    Jun 2011
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    Long Beach, CA
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    Re: Sizing...

    If you go the smaller size route expect to run the pump longer to make enough chlorine during the summer and it will not last as long as the larger sized cells.

    I would opt for the 60k if it was my choice.
    16k gal plaster with raised spa, Jandy DEV60 filter, 2 HP 2-speed SHPF Jandy Stealth pump
    Hayward Aqua Rite T-15 SWCG, Jandy LXi 400k BTU NG heater, 350 sq.ft. of Sun Star solar panels, TF-100 Test Kit, Dolphin s300i Cleaner
    Test Kits . Pool Math . Chlorine/CYA Chart . The SLAM Process

  3. Back To Top    #3

    Join Date
    Aug 2014
    Location
    East Northport, NY
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    Re: Sizing...

    I am about to purchase the aqua pilot tonight for our 33k pool and I initially was looking at the same one you are and a Jandy. After a bunch of research, feedback on this site as well as interactions with Josh at saltwater guys made the decision pretty easy. The RC 60 will last longer and run less than if I used the aqua rite model

  4. Back To Top    #4
    sargent's Avatar
    Join Date
    Aug 2013
    Location
    Tulsa, OK
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    291

    Re: Sizing...

    I have a Circupool Si-40 (which I think is the same as a Si-45), and I am running mine effectively for 3.2 hours a day (actually 45% with 7 hour pump time split into two periods) in a pool about half your size. I'm guessing that in your Arizona pool it would have to run at 100% for maybe 10 hours in the summer. If the comparison table at discountsaltpool is correct, the Circupool Si-45 can generate 2.0 lb of chlorine a day, whereas the AquaRite 40k can generate 1.4 lb. So, I would expect the AquaRite to run at 100% for 14 hours. If you get the Pentair IC60, that can generate up to 2.0 lb of chlorine per day, so it would run for perhaps 10 hours.

    So, figure up the cost of 4 hours per day of pump run time over the life of the cell (although spring, fall, and winter may not have this difference) plus the cost of the shorter life of the smaller cell. Let's assume the average run time is 75% of the summer run time. That would mean 3 hrs of pump run time x 365 = 1095 hours per year. That will cost you about $150 per year with a 1.5 hp pump. I think all the cells are rated for 10,000 hours of operation (580 lb chlorine for the T15 and IC40 cells, 830 lb for the IC60 cell). The IC60 cell will run about 2700 hours per year, so its expected life is 3.7 years. The AquaRite 40k will run about 3800 hours per year, so its expected life is 2.6 years. The Hayward T15 cell costs around $450, and the Pentair IC60 costs around $765. So the yearly cost of the cell is $173 for the T15 and $206 for the IC60. So here is the summary of the annual cost comparison:

    Hayward T15: $150 + $173 = $323
    Pentair IC60: $206 per year

    So, if my assumptions are close to being correct, the Hayward will cost you about $117 more per year to own than the Pentair IC60 (not including the original cost of the equipment). I would go for the bigger cell.
    14k gal IG vinyl, Jandy Flopro 1 hp up-rated, 2 spd pump, Hayward 325 sq ft cartridge filter, Circupool Si-40 SWCG

  5. Back To Top    #5

    Join Date
    Aug 2014
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    Mesa AZ
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    Re: Sizing...

    Thanks all for both the opinions and the hard data, you've convinced me and I will be shopping for the 60k cells - probably the AutoPilot. Pay now or cry later, as they say.
    30k plaster pool
    Pentair 011018 IntelliFlo, Pentair CCP520, IC40 SWG, IntelliPH Acid system
    Easytouch 4 + ScreenLogic2

  6. Back To Top    #6

    Join Date
    May 2014
    Location
    Mesa, Arizona
    Posts
    180

    Re: Sizing...

    Hey neighbor! I think you'd be better off buying bigger, especially since we have peak electricity times here in the valley. I run mine 8 hours/day right up to 1 pm, starting early in the morning. Doing this, I've been able to turn my cell down to 50% thus saving me money in the long run hopefully.
    IG Pebbletec Blue Tahoe; Paddock Pool PCC 2000 pop-up; 22,275 gal 32' x 16' Diving with Auto-Fill
    Pentair 420 Cartridge filter; 3 hp VS Whisperflo Main Drain, 1 1/2 hp Whisperflo Running Pop-Ups; Jandy AquaPure 1400
    1 1/2 Whisperflo dedicated to Rock Waterfall; TF-100; Taylor K-1766; Pool Built in 1997

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