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Old 11-25-2007, 10:18 PM   #31
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I got mine just before we left for the holiday and did not have a chance to use it. I tested it today and found my tap water to have 305ppm of TDS and my RO/DI water to have 004ppm. I guess my RO/DI is doing a pretty good job.
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Old 11-26-2007, 02:44 PM   #32
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That's pretty good Brian. When it gets to about 8-10 you should change your DI cartridge.
Have you test the RO portion (can you?)? You should be getting 90-98% rejection from your membrane. When that starts falling you need a new membrane. Your tap water seems pretty high to me. Mine is in the 180-215 range.
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