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Thread: Problem with auto-shutoff float...

  1. #1
    DIY Junior Member jkats's Avatar
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    Default Problem with auto-shutoff float...

    Hi all,

    I'm running into a minor problem with an install I did for a relative several months ago. The softener has a Fleck 7000sxt, 3.0 ft3 of resin, and an 18x33 brine tank. I used the following settings:

    DF Gal
    VT Df2b
    CT Fd
    C 72
    H 23
    RS sf
    SF 10
    DO 14
    RT 2:00
    BW 10
    BD 60
    B2 5
    RR 5
    BF 32

    After a couple of months, my relative reported that the softener appeared to be "running out" of capacity way before it should, resulting in hard water before the next regen. Upon investigating, I discovered that during the brine fill cycle, it would stop filling about 3/4 of the way through the cycle, due to the auto-shutoff float. When I was installing this, it never occurred to me that this could be a problem, as I've seen very little discussion on this in the forums. However, I obviously need to shorten the float rod. So here are my questions:

    1. How in the world do you shorten this thing?! The info I've found on the web shows that most floats are attached by two rubber washers at the top of the rod that can be adjusted. Mine isn't like that - mine is attached with a permanent pin. The bottom appears to be glued firmly into the float.

    2. Is there a recommended height the float should be at, or is any height ok as long as it is lower than the drain hole?

    3. If anyone cares to comment on my settings, I'd appreciate the feedback.


    Thanks!

  2. #2
    Water systems designer, R&D ditttohead's Avatar
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    Sounds like you have a Clack safety float.

    Simply remove the pin, cut the rod shorter, drill a small hole on the shortened shaft, reinstall, good to go.

  3. #3
    DIY Senior Member mialynette2003's Avatar
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    Another problem that I see is that you have the unit set for a 72K capacity but only a brine refill of 32 min. You would either have to lesson the capacity or increase the fill time.

  4. #4
    Water systems designer, R&D ditttohead's Avatar
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    What is your brine refill flow control? It should be .125 GPM or .25 GPM.

    If your BLFC is .25, then you are ok, if it is .125, then it should be set at 64.

    Here is your basic calc below

    3 cu ft at 8 pounds of salt per cu. ft. x 24,000 grains per cu. ft = 72,000 total capacity (C 72)
    3 pounds of salt per gallon of water, 24 pounds needed = 8 gallons of water
    8 gallons / .25 gallons per minute = 32 minutes. ouble the time if your BLFC is .125.

    Looks like your programming is good, just fix your float height. How high is the bottom of the float off the bottom of the tank?

  5. #5
    DIY Junior Member jkats's Avatar
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    My BLFC is .25, so looks like I'm good there. The bottom of my float is about 13 or 14 inches off the bottom of the tank.

  6. #6
    Water systems designer, R&D ditttohead's Avatar
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    An 18" tank holds 1.1 gallons per inch. -3" for the lower air check, and X.5 for salt displacement (this is never accurate, just an industry guesstimate,

    You have 10" of available space, so you can get approximately 5.5 gallons of water, you need 8. Raise your float much higher, be sure to keep the float height below the overflow hole height.

    Hope this helps!

  7. #7
    DIY Junior Member jkats's Avatar
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    Thanks Dittohead - I cut off 5 inches and all is well!

  8. #8
    DIY Member silversaver's Avatar
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    I'll try this method. I have the same 18x33 tank and same problem.

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