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Thread: Resin found in the drain discharge

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  1. #1
    DIY Junior Member akula1488's Avatar
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    Default Resin found in the drain discharge

    Hi,
    My first post here and I am completely new to water softener systems. So please forgive me if I am asking stupid questions.
    I have just installed a Fleck 7000SXT, 1.5 cu ft resin tank system. There is gravel under bed but the top basket is not installed (it is not in the installation procedure..).
    After the first regeneration a couple days ago, I noticed there is some resin residues in the drain discharge.

    I read it somewhere this is normal for the first regeneration, for softeners with gravel under bed but no top basket and eventually I will not lose more resins. Can any one confirm this?

    Also is it risky to take apart the valve and the resin tank and insert back the top basket? I also read it somewhere that if the distributor is raised up during the process and not put it back to the normal position, when the valve is attached again the distributor can break at the bottom and causes resin and gravel leaks into the plumbing system. Is that the case? If I want to do that, the only way is to dump the resin and gravel such that the distributor can be reset properly?

    I am quite nervous since this is the first time using softener and the first regeneration does not appear normal.

  2. #2
    Water systems designer, R&D ditttohead's Avatar
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    A small amount of resin is normal for the first couple of regenerations, it should stop after that. You should check the dlfc button is installed correctly, and that the right button is included with your system. Also, take the temperature of the water. If it is below 65 degrees, you may want to look at dropping the DLFC size slightly since you dont have a top screen, or add the top screen.

    When removing the valve, kepp turning the valve back and forth, do not just pull it straight up. This will minimize dthe risk of the manifold coming out of the gravel bed. Also, do not put the system into backwash before removing the valve, this will keep the resin and gravel packed down which will also help to keep the manifold in place.

    A 10" diameter tank should have a 2.4 gpm button, a 12" tank should have a 3.5 button assuming your water temperature is not too low. Can you give us more information on your system?

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    DIY Junior Member akula1488's Avatar
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    Thanks for the reply. I am at work and cannot measure the diameter to be sure. I think it is a standard resin tank for 1.5 cu. ft of resin. The drain speed is 3.5 gpm as I recall from the installation instructions. The drain line is 5/8' and about 10 ft long. I live in Southern California and I am not sure if the temperature gets that low at 2 AM.

    What do you mean by dropping the DLFC size? how do I do that?

    Can the loss of resin due to the drain line being clogged?

  4. #4
    Water systems designer, R&D ditttohead's Avatar
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    The drain line being plugged would not cause resin to come out of the drain. If your system is a standard softener without the turbulator and a 10" diameter tank, you should have a 2.4 GPM DLFC button assuming your water temperature is "normal". Southern California rarely has cold water except for some wells in the Universal Studios area, I have seen a couple of wells come out at 40-45 degrees. Very rare.

    The DLFC is in the 90 degree elbow at the valve head, you would remove the grey clip, pull up on the 90 degree fitting, it should remove easily. Inside of that elbow is the rubber button, it will have the flow rate molded into it. 2.0, 2.4, and 3.5 are the most common. If you have a 10" tank, no turbulator, you need a 2.4 button, not a 3.5.

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    DIY Junior Member akula1488's Avatar
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    Thanks for the reply again. what's the reasoning to have the proper size for the DLFC? Is it because higher than required backwash rate with respective to the resin tank size, can cause the resin to float up and escape to the drain line?

  6. #6
    DIYer, not in the trades LLigetfa's Avatar
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    I find it odd that the pressure is never mentioned but that a lot of attention is given to temperature. If the system pressure is higher, would not the flow increase across the DLFC? It sure does on my systems.

  7. #7
    Water systems designer, R&D ditttohead's Avatar
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    In theory yes, but modern DLFC's are designed to accomodate the varying pressure changes. We test several different manufacturers flow controllers, and for the most part, they are very accurate from 35-100 psi. Some of the import systems have a hard button and the flow varies wildly with pressure. The flow restrictor will close up under higher pressure thus allowing a very constant flow regardless of pressure (to a limit of course). Temperature on the other hand will change a fluids viscosity. Colder water is much more dense and therefore will lift the resin higher with the same amount of water.

    We regularly test Fleck, Clack, Dole, and a couple others. The import softener control valves that include their own DLFC button tend to be acurate at about 50 PSI, so some changes may need to be made depending on pressure.

    As the pressure increases, the hole size decreases. This will increase the sound dramatically without affecting flow rate. You may be hearing the higher pressure, this is normal, but the flow will only slightly increase if at all.

    Hope this explains it.
    Last edited by ditttohead; 09-05-2012 at 08:50 PM.

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