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Thread: Need help with Fleck 7000SXT programming

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  1. #1
    DIY Junior Member JimmyG's Avatar
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    Default Need help with Fleck 7000SXT programming

    I recently purchased a 48K, 1.5 cu ft Fleck 7000SXT water softener to replace my old kenmoore system that finally died, after 8 years. I've programmed it myself from what I learned on this forum but i'm not getting the water as soft as it was before. When showing the water is mostly soft but I can still feel some hardness in the water. I'm sure this softener should works better than my old one.

    I've tested the water at the well and it has a hardness of 20 grains with 3 grains of iron. I tested the water inside the house and it was a hardness of about 3 grains. I'm not sure if it should be zero or if 3 is normal. There are 2 people living in the house and use about 180 gal/day. I started with 6 lbs of salt per cu ft of resin, 9 lbs total, and have slowly increased it to 15 lbs per cu ft, or 21 lbs total.

    The DLFC is 2.4 gpm and the BLFC is .125 gpm.

    The settings are as follow:

    Capacity = 36,000
    Hardness = 30
    RS = SF
    SF = 20
    DO = 7
    B1 = 10
    BD = 65
    B2 = 10
    RR = 10
    BF = 60

    I would like it to regenerate every 7 days.

    I would appreciate any help and advice you guy's can give. Thanks

  2. #2
    DIY Senior Member Reach4's Avatar
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    Non pro. Took a look at the manual, and here are some comments... probably not useful.

    Dropping to 3 grains from 20 is not so good in my opinion. Is that sample from cold water, or from hot which might have sat in the tank for a while after you added the softener? I test 1 or less on harder water than you on what seems like a very old softener.

    I think you are setting this to regen every 7 days, or sooner if you have a lot of use. There are diagnostics like HR Hours in Service since the last regeneration cycle. VU is volume used since last regen. I presume that is gallons, but their example of 25,000 seems very high.

    Are you sampling the day after a regen, or the day before a regen,.

    Is about 7 pounds of salt disappearing from the brine tank each regen? I bring that up in case you have a salt bridge or some other thing limiting the brine flow.

  3. #3
    Water systems designer, R&D ditttohead's Avatar
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    3 grains or iron? Do you mean 3 PPM of iron? If so, each ppm of iron should be compensated at 5 grains, so you would add 15 grains to your actual hardness. And you should use a high salt setting, 10+ pounds per cu.ft. and I would recommend using iron out salt or a regular cleaning of the resin bed should be done. Or... get an iron removal system ahead of the softener.

  4. #4
    That's all folks! Gary Slusser's Avatar
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    JimmyG, you should click on the link in my signature. Actually ya shoulda done it before buying the new softener because you are going to get terrible salt efficiency with a 1.5'. And understand that most here do not have much experience in removing iron with a softener and would rather have people buy an iron filter and a softener. Use 4 gpg per ppm of iron and 3000 grains per lb of salt to calculate the K of capacity/gallons between regenerations and use regular solar salt. Then every 6 weeks do a manual regeneration after mixing a 1/4 cup of Iron Out in a couple gallons of water and pour it into the water in the brine well in the salt tank and your softener will do a fine job removing your 3 ppm of iron. You can buy 5 lbs IIRC of Iron Out or Super IO at most grocery or big box stores. It is a much better way to keep all parts of the softener iron free and overall it costs less than the IO salt.
    Gary Slusser Retired (= out of business)
    Click Here to learn how to correctly size or program a water softener.
    CAUTION, as of Nov 12 2013 all YouTube videos showing how to rebuild a Clack valve have an error in them that can cause damage.

  5. #5
    In the Trades Tom Sawyer's Avatar
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    Most of us here have a whole lot of experience using a softener to remove iron which is why most of us don't recommend using a softener to remove iron. However, Iron or not, your salt efficiency and water efficiency is going to suck big time.
    [B]No, plumbing ain't rocket science. Unlike rocket science, plumbing requires a license[B]

  6. #6
    Water systems designer, R&D ditttohead's Avatar
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    Wow, we have no experience removing iron with a softener???? LOL. Like Tom said, because we do have real world experience and knowledge and training and certifications and education and we can use a calculator and common sense is why we dont recommend a softener for higher levels of iron removal. In theory, you could do 20 PPM iron with a softener, but that would not be a wise design choice. Your system is undersized for this application. Some people on this forum have no considerations for the environmental impact water softeners can have especially on inland water supplies. It is true that a single residentail application has almost ne real world impact, but commercial users of softeners, and large amounts of residential users do have an impact on the water supplies. Using a softener for iron removal is one of the most inefficient ways to treat iron. It is also fairly cheap since you already have a softener, it can do double duty.

    So, is your iron 3 ppm?

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