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Thread: Does 2 Intex = 1 larger SWG?

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    Does 2 Intex = 1 larger SWG?

    It may be a crazy idea, but would 2 Intex SWG put in-line with each other produce double the chlorine and so be good enough for a 25,000 gallon pool? Buying 2 at $125 or so each sounds a lot cheaper than $700-900 or so for larger SWG. Having 2 in-line would also provide a backup if one stopped working (get half the chlorine at least). I know the larger ones also have other features, but would it work?
    18' x 38' x 52" oval AGP with 6' deep end (foam on the walls, preformed coving, and Happy Bottom floor padding)
    Pentair Optiflow 1 HP 2 Speed pump
    Pentair cc200 cartridge filter
    Pentair UltraTemp Model 110 BLK 108,000 BTU Heat Pump
    2 Intex SWG's (copper unplugged)

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    JasonLion's Avatar
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    Re: Does 2 Intex = 1 larger SWG?

    That could work. You would want to plumb them in parallel, not sequentially. You also need enough water flow that they each get a reasonable flow rate.

    Remember that they don't meet code for in-ground or permanently installed pools.
    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

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    Re: Does 2 Intex = 1 larger SWG?

    I am looking at a 18'x39'x52" oval above ground pool, with like 4" of wall and a deep end dug in and 4' above ground. (It has flat sides and rounded ends... so I'm guessing the gallons is in-between a rectangle and pure oval pool). I plan to put a deck around half of it... so I'm guessing that's still considered a non-permanent above ground pool.

    Why would plumbing them in parallel be better than sequentially?
    18' x 38' x 52" oval AGP with 6' deep end (foam on the walls, preformed coving, and Happy Bottom floor padding)
    Pentair Optiflow 1 HP 2 Speed pump
    Pentair cc200 cartridge filter
    Pentair UltraTemp Model 110 BLK 108,000 BTU Heat Pump
    2 Intex SWG's (copper unplugged)

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    JasonLion's Avatar
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    Re: Does 2 Intex = 1 larger SWG?

    It isn't absolutely essential, but there are a couple of advantages. First, calcium flakes can come off of the plates when the cell reverses, and you don't want those getting caught in the next unit. Second, they aren't designed for high flow rates. Running a large pump through two sequentially would restrict the flow more than you might want. Third, they give off hydrogen gas, and they work a little better if they don't have to deal with the extra hydrogen from a previous unit.
    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

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    Re: Does 2 Intex = 1 larger SWG?

    Ok, that makes sense. So basically get a couple Y connectors before and after them and make sure the pump is strong enough for a decent flow.

    Has anyone tried something like this before? Are there any negatives that I haven't thought of?
    18' x 38' x 52" oval AGP with 6' deep end (foam on the walls, preformed coving, and Happy Bottom floor padding)
    Pentair Optiflow 1 HP 2 Speed pump
    Pentair cc200 cartridge filter
    Pentair UltraTemp Model 110 BLK 108,000 BTU Heat Pump
    2 Intex SWG's (copper unplugged)

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    crookm11's Avatar
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    Re: Does 2 Intex = 1 larger SWG?

    Quote Originally Posted by JasonLion
    That could work. You would want to plumb them in parallel, not sequentially. You also need enough water flow that they each get a reasonable flow rate.

    Remember that they don't meet code for in-ground or permanently installed pools.
    Hi Jason,

    I have heard of these units not being UL Certified, does that make them not meet code? If so then why does mine say:

    Conforms to UL STD. 1081 certified to CSA STD. C22.2 No. 218.1-M89

    Thanks
    Mark Crook
    13,500 Gallon 24' x 52" Intex Ultra Frame
    Intex Sand Filter and Pump, Intex SWG (All hard PVC plumbed)
    TFTestKit-100---Pool School---The Pool Calculator
    Location: Copperas Cove, Texas --- My Pool Build---Useful Links for Intex Pool Owners

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    JasonLion's Avatar
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    Re: Does 2 Intex = 1 larger SWG?

    I wasn't talking about UL listed. For an in-ground pool they need to be bonded, but I don't believe that they have a bonding lug to connect the bonding system to.
    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

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    crookm11's Avatar
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    Re: Does 2 Intex = 1 larger SWG?

    Thanks Jason,

    I just read 1081 and it does talk about a bonding wire or lug needed for permanent pools. Didn't realize the pool in question was an inground pool. I don't want to start any confusion.

    Mark Crook
    13,500 Gallon 24' x 52" Intex Ultra Frame
    Intex Sand Filter and Pump, Intex SWG (All hard PVC plumbed)
    TFTestKit-100---Pool School---The Pool Calculator
    Location: Copperas Cove, Texas --- My Pool Build---Useful Links for Intex Pool Owners

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    Re: Does 2 Intex = 1 larger SWG?

    After reading some other threads about Intex SWG's etc... I think I'm going to try to find an old-style one that created more chlorine if I can, and also use borates which decreases the chlorine need (and everyone seems happy with), and see if one Intex SWG does the job. If not, I'll have to play around with the plumbing to put on 2, but I'm hoping that isn't needed now.
    18' x 38' x 52" oval AGP with 6' deep end (foam on the walls, preformed coving, and Happy Bottom floor padding)
    Pentair Optiflow 1 HP 2 Speed pump
    Pentair cc200 cartridge filter
    Pentair UltraTemp Model 110 BLK 108,000 BTU Heat Pump
    2 Intex SWG's (copper unplugged)

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    dmanb2b's Avatar
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    Re: Does 2 Intex = 1 larger SWG?

    If you can find an old one and are willing to let it run 6-8 hrs per day, I'm guessing it would work. My unit handles our 13k gal pool in 2-3hrs/day...I just wish intex made a 2.5hr setting
    24'x52" AGP (13,500 Gallons), Intex SWG, (2)Solar Bear 4x20 panels, Hayward S220T Filter, 1/2hp Pentair Superflo

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    Re: Does 2 Intex = 1 larger SWG?

    Quote Originally Posted by dmanb2b
    If you can find an old one and are willing to let it run 6-8 hrs per day, I'm guessing it would work. My unit handles our 13k gal pool in 2-3hrs/day...I just wish intex made a 2.5hr setting
    Usually pumps are run 8-12 hours or so a day, correct? So having the SWG run for 6-8 hours should work... will get used up faster I guess, but one burning out in 2 years is the same as using 2 and them lasting 4 years. And at their price, even one a year would be about the same as buying the chlorine or getting a more expensive SWG that lasts 2-3 years. So I think I'll try it and see how it goes.
    18' x 38' x 52" oval AGP with 6' deep end (foam on the walls, preformed coving, and Happy Bottom floor padding)
    Pentair Optiflow 1 HP 2 Speed pump
    Pentair cc200 cartridge filter
    Pentair UltraTemp Model 110 BLK 108,000 BTU Heat Pump
    2 Intex SWG's (copper unplugged)

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    dmanb2b's Avatar
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    Re: Does 2 Intex = 1 larger SWG?

    Quote Originally Posted by HotShot53
    Quote Originally Posted by dmanb2b
    If you can find an old one and are willing to let it run 6-8 hrs per day, I'm guessing it would work. My unit handles our 13k gal pool in 2-3hrs/day...I just wish intex made a 2.5hr setting
    Usually pumps are run 8-12 hours or so a day, correct? So having the SWG run for 6-8 hours should work... will get used up faster I guess, but one burning out in 2 years is the same as using 2 and them lasting 4 years. And at their price, even one a year would be about the same as buying the chlorine or getting a more expensive SWG that lasts 2-3 years. So I think I'll try it and see how it goes.
    For your size pool, 8-12 hours sounds about right. I can get by with 4 hours a day, but we recommend at least one full turnover
    24'x52" AGP (13,500 Gallons), Intex SWG, (2)Solar Bear 4x20 panels, Hayward S220T Filter, 1/2hp Pentair Superflo

    Pool School, TFTestKits, Pool Calculator

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    Re: Does 2 Intex = 1 larger SWG?

    I want to be able to superchlor or shock my pool and using one unit at 12hrs/day over a few days couldn't pull it off so I bought 2 more fernco rubber couplers and am adding my second unit in parallel (taken off my spa, sorry spa) I'll prob do a fresh thread with pics and a UTUbe video, the world needs to know $1000 to the local pool store isn't the only way to SW chlor a pool baby!
    20,000 gal. 32' x 17' freeform custom pool, 3ft. shallow - 8ft. deep end, Pentair Whisper flow 2.2 HP WF-6, Purex/Triton Nautilus FNS48 DE filter, 2 Intex Chlorine Generators (retired) SR Smith Rouge Rapids curved slide, The Pool Cleaner 4-wheel model w/Hayward large leaf canister. Tightwatt pool timer Spa: Beachport 5 person/350gal. Wishlist: move Neiko Tools pump to slide, solar system, Fountain, Automation. http://www.poolcalculator.com/

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    Re: Does 2 Intex = 1 larger SWG?

    .....Also I want to show off my blue/amber LED mod to the units
    20,000 gal. 32' x 17' freeform custom pool, 3ft. shallow - 8ft. deep end, Pentair Whisper flow 2.2 HP WF-6, Purex/Triton Nautilus FNS48 DE filter, 2 Intex Chlorine Generators (retired) SR Smith Rouge Rapids curved slide, The Pool Cleaner 4-wheel model w/Hayward large leaf canister. Tightwatt pool timer Spa: Beachport 5 person/350gal. Wishlist: move Neiko Tools pump to slide, solar system, Fountain, Automation. http://www.poolcalculator.com/

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    Re: Does 2 Intex = 1 larger SWG?

    Cool, I look forward to seeing it and hearing how it works...
    18' x 38' x 52" oval AGP with 6' deep end (foam on the walls, preformed coving, and Happy Bottom floor padding)
    Pentair Optiflow 1 HP 2 Speed pump
    Pentair cc200 cartridge filter
    Pentair UltraTemp Model 110 BLK 108,000 BTU Heat Pump
    2 Intex SWG's (copper unplugged)

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    Re: Does 2 Intex = 1 larger SWG?

    just installed the 2nd unit tonight, I modded both the units soo they can run manualy and 24hrs/day if i need it. This will yeild up to 1,200 grams (42.3 oz. or 2.64 lbs.) of chlorine per 24/hrs. by a calculation from another thread (thanks jason )

    I shot a video for each mod, the first is 38 mins, 2.5gigs the second is 24mins.
    I ment these for Utube but they limit vids to 10mins and my software for my 2011 Panasonic camcorder won't cut videos up that i can figure.
    Mod 1: reversable to stock, simple wiring overide, whenever the flow switch is on, the unit turns on the blue Chlor LED and makes chlorine, a green power LED replaces the sleep light. the logic board functions are not used (no salt level checking)

    Mod 2: I wanted the unit to operate stock and have a option to manually overide for more chlorine. Unit works stock, added green and red LEDs to indicated cell polarity(curious how often it does this for cleaning) Added a set of realys ans fan overide triggered by a external AC adapter, when the unit is sleeping i can have a timer switch the powerpack on activating the Chlor cell and get another 12hrs if i need it

    I'm going to start a new thread to talk about it and provide links to my vids, prob use google docs.
    20,000 gal. 32' x 17' freeform custom pool, 3ft. shallow - 8ft. deep end, Pentair Whisper flow 2.2 HP WF-6, Purex/Triton Nautilus FNS48 DE filter, 2 Intex Chlorine Generators (retired) SR Smith Rouge Rapids curved slide, The Pool Cleaner 4-wheel model w/Hayward large leaf canister. Tightwatt pool timer Spa: Beachport 5 person/350gal. Wishlist: move Neiko Tools pump to slide, solar system, Fountain, Automation. http://www.poolcalculator.com/

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    Re: Does 2 Intex = 1 larger SWG?

    HotShot53- check out my new thread, it works great!
    twin-intex-swg-installation-modded-to-run-24hrs-t36140.html
    20,000 gal. 32' x 17' freeform custom pool, 3ft. shallow - 8ft. deep end, Pentair Whisper flow 2.2 HP WF-6, Purex/Triton Nautilus FNS48 DE filter, 2 Intex Chlorine Generators (retired) SR Smith Rouge Rapids curved slide, The Pool Cleaner 4-wheel model w/Hayward large leaf canister. Tightwatt pool timer Spa: Beachport 5 person/350gal. Wishlist: move Neiko Tools pump to slide, solar system, Fountain, Automation. http://www.poolcalculator.com/

  18. Back To Top    #18

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    Re: Does 2 Intex = 1 larger SWG?

    I just set mine up last week, I have 2 returns, one SWG on each. Haven't really tested how much they are making yet... but should be enough I'm sure
    18' x 38' x 52" oval AGP with 6' deep end (foam on the walls, preformed coving, and Happy Bottom floor padding)
    Pentair Optiflow 1 HP 2 Speed pump
    Pentair cc200 cartridge filter
    Pentair UltraTemp Model 110 BLK 108,000 BTU Heat Pump
    2 Intex SWG's (copper unplugged)

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