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Thread: SWG systems that will work at lower flow rates

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    SWG systems that will work at lower flow rates

    I have a 12,000 gallon pool in Central Florida that I am interested in switching to a SWG system. The concern that I have is that I use an Pentair Intelliflo pump that I run 24 hours a day at only 1,230 RPM. I don't have the GPM equivalent for that as it doesn't show that on the display of my model. My guess is that I am moving about 20 GPM or so at 2 PSI (measured 40 GPM on the discharge with no back pressure). I run it this slow since it meets my filtration needs just fine and the pump is only using 140 watts at that speed. That's 3.36 kWh/day or 102 kWh/month which is less than $10/month here in electricity. I have a 10kW solar system and try to keep my bill at net zero in all but the summer months so that is my motivation for the slow (and thus highly efficient) speed. Even without the solar system, it is just good practice to use as little energy as necessary to accomplish a task.

    Anyway, when researching SWG systems several years ago I discovered that most of them will not operate at low flow rates. Do any of you know what the typical minimum flow rates are for the common SWG systems these days? Do you know of any of the systems that has lower flow rate requirements than others? I would like to avoid turning up the pump speed just to accommodate a SWG system.

    Thanks for your thoughts.

    David
    David Jensen 12,000 gallon concrete pool in central Florida.

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    Re: SWG systems that will work at lower flow rates

    The Hayward Swimpure/Aqua Rite systems work well in lower flow situations. Lowest of all the major systems if I'm not mistaken.

    You still may have issues at 1230 RPM though. Bumping it up a few hundred RPM for 8 hours a days or so to get the salt system going probably isn't going to put a big dent in your electric.
    25K aggregate IG, Intellipro, FNS48, Polaris 360, PG2000 fiber optic light source

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    Mod Squad Jimrahbe's Avatar
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    Re: SWG systems that will work at lower flow rates

    Tiffani,

    My Pentair IC40 runs well at 1,200 RPM. Others here run theirs as low as 1,000 RPM.

    The exact flow rate will depend on your plumbing and filter. My filter pressure is about 3 PSI.

    Jim R.
    Finished in 2015 - 17K Gal, IG, 20' x 25' Almost Rectangular Pool, Pebble finish, three rockport water falls. Pentair Equipment: EasyTouch 4, IC40 SWG, 3 HP VS Pump, CCP520 Cartridge Filter.
    TF100 with SpeedStir and SampleSizer, ColorQ Pro 7, Dolphin Premier Robot Cleaner, added Screen Logic 2, added small 3 person Calder Spa.

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    Re: SWG systems that will work at lower flow rates

    I can run my Hayward AquaRite SWG at 1100 with no problems.
    10,000 gal Inground Fiberglass Pool;Aquarite SWG; Hayward H Series Gas Heater;
    Hayward Sand Filter; 1.5 HP Hayward Max-Flo VS Pump; Dolphin Pool Cleaner; TF100 Test Kit

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    Mod Squad pooldv's Avatar
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    Re: SWG systems that will work at lower flow rates

    My Pentair IC40 will run at 900 rpm with occasional flow errors as the filter gets dirty. It runs at 1100 rpm with no flow errors ever, no matter how cdirty the filter gets. The pump uses 150 watts at 1100 rpm.
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    Re: SWG systems that will work at lower flow rates

    You also need to include the power consumed by the SWG. The units I looked at were listed at about 200 watts.
    20' x 40' 30,000 gallon IG Plaster with Spa, wading pool, fountain built 1993
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    Re: SWG systems that will work at lower flow rates

    This is good news. I've never seen anyone else around here (where I live) that has figured out that it is far more efficient (and quieter) to run the pump longer at these slow speeds so I'm glad to read that there are others that are doing the same (and therefore don't think I'm crazy)! I now wish that I would have made the switch to SWG two years ago.

    Considering that it is especially important to avoid adding additional restrictions into the piping system with already-low flow rates, I would like an SWG that is as free flowing as possible. It appears that a product like the Pentair IC40 referenced by Jimrahbe does that. The Circupool SJ-40 that appears highly rated on Amazon appears to be much more restrictive. Any thoughts there?

    BTW, I am not Tiffani Ainsworth as it says on my post footer. My account was set up in 2008 and I think that something got mixed up with my account and Tiffani's somewhere along the way. I'll have to see if I can edit that name out of my account.

    David Jensen
    Last edited by floridaguy; 08-21-2016 at 03:11 PM. Reason: to clarify
    David Jensen 12,000 gallon concrete pool in central Florida.

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    Mod Squad Jimrahbe's Avatar
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    Re: SWG systems that will work at lower flow rates

    Sure David, that's what they all say...

    I've only seen a couple of brand name SWGs, and internally they looked about the same, restriction wise. I doubt that there is any major differences between any of them, that would matter all that much.

    I like my IC40, but the down-side is that if you do not have Pentair Automation, the output can only be adjusted in 20% increments. Not a major issue , but something that you should know beforehand.

    Thanks,

    Jim R.
    Finished in 2015 - 17K Gal, IG, 20' x 25' Almost Rectangular Pool, Pebble finish, three rockport water falls. Pentair Equipment: EasyTouch 4, IC40 SWG, 3 HP VS Pump, CCP520 Cartridge Filter.
    TF100 with SpeedStir and SampleSizer, ColorQ Pro 7, Dolphin Premier Robot Cleaner, added Screen Logic 2, added small 3 person Calder Spa.

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    Re: SWG systems that will work at lower flow rates

    Autopilot models support 20 gpm, and read of people running down to 15. I am about to get mine (controller for Total Control so I can add ORP/PH control next spring - the Pool Pilot Digital is same basic controller) and will replace my pump with vs one to run 24 hours/day so I can adjust down to the lower rate.
    38'x16' Fiberglass pool - 3.5' - 8' deep - 19,000 gallons. AutoPilot Total Control SWG (RC-52 cell), Pentair SuperFlo VS, Pentair SD70 Sand Filter, Coverstar Automatic Cover, 10' board, PAL Treo lighting, Polaris 9550 Sport robot, Lamotte ColorQ Pro 7 test kit.

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    Re: SWG systems that will work at lower flow rates

    There were some issues with one of the conversions merging some sigs. Click QUICK LINKS above and then Edit Signature. More here on sigs, Pool School - Read This BEFORE You Post
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    Re: SWG systems that will work at lower flow rates

    In response to the Circupool system, I have and RJ60+ and my pressure didn't go up any at all from pre-swg setup. Not sure if anyone else may have had a different experience though.
    23,000 - 18x36 - IG Vinyl - Hayward Pro Series 244T Sand - 1HP Hayward Pump - Circupool RJ60 Plus - K2006

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    Re: SWG systems that will work at lower flow rates

    The CircuPool SJ and Jandy Aquapure SWG's require higher flow rates than all the other brands. CircuPool RJ units require less flow than the SJ units.

    Hayward, AutoPilot, Pentair and CircuPool RJ should all work fine with the lower flow rate that you want to use.

    Pentair will most likely require automation to control the output if you plan on running 24/7, as 20% is the lowest setting for the output without automation.
    16k gal plaster with raised spa, Jandy DEV60 filter, 2 HP 2-speed SHPF Jandy Stealth pump
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    Re: SWG systems that will work at lower flow rates

    Hayward, AquaRite, SwimPure, Goldline (all the same unit sold under several names) is the one most poeple report as working well in low flow situations. The minimum rpm will vary depending on your plumbing, type and size filter and even if the filter was recently cleaned.

    In my system it works well at 1300 rpm, I run 1400 just to be sure. Many others report 1000 rpm as working dependability in their system. If you use the T-15 you could generate all the chlorine you need in a few hours. So, even if you had to boost your speed it would only need be for a couple hours a day.
    chiefwej
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    16x36 rectangular (19k) Pebble Tec play pool/spa, Pentair Intelliflo VS 011018, Super II 2hp (spa), Aqua Rite T-15 SWG, Pro Grid 60 DE, Hayward H400 & Heliocol Solar heating, A&A infloor system, fill water w/high CH and TA, 50 ppm borates,TF-100 test kit

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    Re: SWG systems that will work at lower flow rates

    The Jandy Aquapure requires a 40 GPM flow which is higher than most. I also have a Intelliflow pump which gets there at just about 1400 rpm. One of the advantages of the pump we have is that you can program the cycles, so I do 6 hours at 1500 rpm (290W) for the chlorine generating, and 18 hours at 750 rpm (100W) which gets me the turn overs and makes sure the SWG cell is not staying on without flow going through it.

    Hope this helps.
    17.5K gal, IG PebbleTec, 3HP Pentair Intellifow, Hayward C4020 - 425 sqft cartridge filter, Jandy Apure 35 SWG
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    Re: SWG systems that will work at lower flow rates

    i could run my hayward at 1500rpm, my first pentair ic40 at 1900rpm and now my newer ic40 at 1700rpm. just get the best brand and schedule your run time around that. you dont need to run 24/7.
    19K IG Pebbletec with attached spa. 60sqft Cartridge filter, Intelliflow VS, 399k BTU Gas Heater, Pentair IC40. Phoenix, AZ, full sun.

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    Re: SWG systems that will work at lower flow rates

    Quote Originally Posted by AKStrong View Post
    The Jandy Aquapure requires a 40 GPM flow which is higher than most. I also have a Intelliflow pump which gets there at just about 1400 rpm. One of the advantages of the pump we have is that you can program the cycles, so I do 6 hours at 1500 rpm (290W) for the chlorine generating, and 18 hours at 750 rpm (100W) which gets me the turn overs and makes sure the SWG cell is not staying on without flow going through it.

    Hope this helps.
    Based on your post it reads like you are depending on the flow switch to turn the SWG on and off. If so that is not recommended for safety reasons.
    chiefwej
    Tucson, AZ
    16x36 rectangular (19k) Pebble Tec play pool/spa, Pentair Intelliflo VS 011018, Super II 2hp (spa), Aqua Rite T-15 SWG, Pro Grid 60 DE, Hayward H400 & Heliocol Solar heating, A&A infloor system, fill water w/high CH and TA, 50 ppm borates,TF-100 test kit

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