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Thread: fleck 4650

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    DIY Junior Member a1cmaw's Avatar
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    Default fleck 4650

    hi all, great forum, lots of good info.

    looking to update my softener and neutralizer. have an old rainsoft that broke and a neutralizer with a fleck 4650 valve. anyone ever seen a fleck 4650 used for neutralization? i just want to make sure this is the correct application as everything i'm reading is that it's for softening. and pentair actually calls it a hot water control valve (whatever that means). any information would be appreciated.

    thanks!

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    Water systems designer, R&D ditttohead's Avatar
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    It can be used for cold water, hot water, softening, filtering, etc. I would not recommend it for chemical injection (pot perm, etc) but other than that, it is basically a brass bodied 5600. I use a ton of them for dish washer softeners, up to 150 degrees.

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    DIY Junior Member a1cmaw's Avatar
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    thanks for your quick reply.

    one dumb question though, how does the valve know what configuration it is installed in? the valve seems pretty basic.

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    Water systems designer, R&D ditttohead's Avatar
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    A softener valve will have a brine system, a backwashing system will have the brine system disabled/plugged. Their are some minor changes that are informational only, and it is unlikely anybody would ever notice. Many companies only stock the softener version of the valve, and simply modify the valve for backwashing for the rare occasion that it is needed for that.

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    DIY Junior Member a1cmaw's Avatar
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    so what happens during the brine related parts of the cycle? is it essentially wasting water? or does it need to perform those steps anyway?

    Quote Originally Posted by ditttohead View Post
    Many companies only stock the softener version of the valve, and simply modify the valve for backwashing for the rare occasion that it is needed for that.
    so what is your preferred valve for a neutralizing/backwash system (assuming those two are the same)? it sure seems this forced regeneration is awfully wasteful...

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    DIY Senior Member Reach4's Avatar
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    The BF (brine fill) is set to zero, which concludes the process. I don't know what happens if you don't have a solution tank to draw from.. That part of the cycle can probably be disabled, but even if the line is just plugged, that cycle just becomes a slow rinse anyway.

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    Water systems designer, R&D ditttohead's Avatar
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    The brine cycle on a mechanical system does not waste water since the injector is replaced with a non drilled injector (plugged). It basically does a 10 minute backwash, 60 minute standby cycle, 10 minute fast rinse. This is a simplification, but you get the point. On a 4650 backwash valve, the main sticker is different indicating no cycle step between the backwash and fast rinse.

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    DIY Junior Member a1cmaw's Avatar
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    thanks for the help!

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