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Thread: K-1766 Drop Test Results Compared to SWG System Reading

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    Join Date
    Apr 2016
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    Riverview, FL
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    350

    K-1766 Drop Test Results Compared to SWG System Reading

    I've been maintaining my pool with SWG since it was completed last year. I've been relying on the readout from my SWG system (Hayward AutoRite) but have been reading messages where the K-1766 test was more accurate. I purchased the kit (only $20 delivered). The results were the test kit showed a reading of 3300 (20ml test). I checked my Hayward display and it was 3300, exactly the same.

    It's good to know that Hayward unit is accurately reporting and now with test kit I'll verify it every 3 months. My salt initially started at 3400, so since July 2016 it's only dropped by 100ppm.

    Curious what others who have a K-1766 kit have found as variance between their K-1766 drop test and and their SWG system readout.
    Free Form 13K IG (Quartz) w/Screen Enclosure - 2 Sheer Descents, 1 Bubbler - Hayward 60 SF DE Sta-Rite - Hayward SP3400VSP EcoStar - Hayward Aqua Rite AQR9 (T-Cell-9) SWG - Zodiac MX6 - July 2016 - Taylor K-2006 - Taylor K-1766 Salt Test

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    Patrick_B's Avatar
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    Jun 2011
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    Midland TX
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    14,999

    Re: K-1766 Drop Test Results Compared to SWG System Reading

    Can't speak for that, but this test has been an old faithful in the Lab for a long, long time. Not the fave of any water tester I know but it's very a good method.
    TFP Moderator
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    28K Gal IG FreeForm, CLI Quartz, Pentair 36"SF & VS Pump, Dolphin M5, Rheem

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    ComputerGuyInNOLA's Avatar
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    Oct 2012
    Location
    Mandeville, Louisiana
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    608

    Re: K-1766 Drop Test Results Compared to SWG System Reading

    I calibrate my SWCG to my K1766 every year. I always wait untill the water warms before I calibrate it. My SWCG always shows lower salt when the water temp is below 78. I tested mine when my water temp was 52 degrees. My SWCG showed 2800 but the K1766 showed 3200. I tested mine last week with the water temp at 76 and they were within 100 ppm.
    Gunite/Plaster pool at 13k gallons. All Jandy with CL340 series cartridge filter, 1.5 HP Jandy Stealth pump. Jandy 1400 SWCG and PDA4 controller. Dual waterfalls. Polaris 280. Pool installed August 2012. Southern Louisiana. And lets not forget my trusty TF100 test kit!

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    Join Date
    Apr 2016
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    Riverview, FL
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    350

    Re: K-1766 Drop Test Results Compared to SWG System Reading

    I'm lucky, in FL my water only dropped below 69 this winter for three weeks, the lowest was 65. All during this time my SWG system has consistently showed the salt level as virtually unchanged (3200-3300). So from that I see that the mildly cool temps for me hasn't affected how my SWG has measured the salt level.

    Curiously, I wonder if the drop test is impacted by water temps.
    Free Form 13K IG (Quartz) w/Screen Enclosure - 2 Sheer Descents, 1 Bubbler - Hayward 60 SF DE Sta-Rite - Hayward SP3400VSP EcoStar - Hayward Aqua Rite AQR9 (T-Cell-9) SWG - Zodiac MX6 - July 2016 - Taylor K-2006 - Taylor K-1766 Salt Test

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    JoyfulNoise's Avatar
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    May 2015
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    Tucson, AZ
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    14,077

    Re: K-1766 Drop Test Results Compared to SWG System Reading

    Pentair IntelliChlor's are not known for reporting salt with a great degree of accuracy (they have lousy temperature compensation) but my IC will read 3800ppm while my true salt level is 4000ppm. The K-1766 is the most accurate test you can use and so it's a good way to diagnose a potentially failing cell.


    Matt
    16k IG PebbleTec pool, 650gal spa, spillway and waterfall, 3HP IntelliFlo VS / 1.5HP WhisperFlo, Pentair QuadDE-100 filter, IC40 SWCG, MasterTemp 400k BTU/hr NG heater, KreepyKrauly suction-side cleaner Dolphin S300i robot, EasyTouch controls, city water, K-1001, K-2006 and K-1766 test kits, Mannitol test for borates

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