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Old 07-31-2011, 10:10 AM   #11
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Yes you were right. TDS after RODI 0 or sometimes 0.001. TDS after DI 139. It is that just my LFS store said it lasts 6.000 galons. That is why I did not change it. Am I stupid? So it looks that I should keep my new RODI. Unless when I replace DI resin <55.00 bucks> It will show - but I dont belive it will, do you???
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Originally Posted by ccCapt View Post
That's a problem for sure. And no way does the resin last 3 years.
Do you have a TDS meter? If so, what does it read on the "good" water?
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Old 07-31-2011, 01:40 PM   #12
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The new DI resin should drop it back down to 0, but if you aren't filtering (a sediment filter won't help much) the water going into the DI resin it will again deplete very quickly. A "DI only" filter can become very expensive just due to the fact you will have to replace the resin very often.
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Old 07-31-2011, 03:35 PM   #13
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I guess I keep RODI filter. But still I will buy DI resin and see if it is 0 since now I have TDS meter. In my old DI I have 2 sediment filters and carbon filter before DI resin. Will see .. thanks a lot!!!
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Old 07-31-2011, 07:51 PM   #14
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Don't forget, you also need to change the sediment and carbon filters at least every 6 months depending on the quality of the "raw" water going into it.
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Old 07-31-2011, 09:45 PM   #15
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Certainly not stupid. It just shows that we need to test. 136 after the DI means that resin is shot. I just replaced mine and it was less than a year. I only had a 75 and that was a 5 stage RODI.
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