View Full Version : DI replacement.
01/03/2009, 08:25 AM
My 75gal. premium unit is working great so far. My question is, on average, how much should the DI resin change colors before you replace it. At this point aprox. 2in. have changed colors starting at the bottom and I still get 0 tds.
01/03/2009, 08:32 AM
Use the color change as a rough indication that its time to break out your tds meter more often and keey an eye on it. Depending upon how much water you make, and how clean your RO water is, you might still be getting 0 tds a month from now.
01/11/2009, 10:08 PM
My 75 prem has been working great for about 3+ months. I have made around 100-150 gallons of Ro/DI water with it. Just the last round the TDS went from 0 to 75. What is the issue? There are no colors changes in any off the filters. Should I try to flush it for a while? Any help would be great.
01/12/2009, 04:56 AM
My guess is that you were measuring tds creep water - let the system run for a couple of minutes before you take a sample.
01/12/2009, 07:24 PM
What do you mean by creep water? I allowed the system to run for around one hour, then took a sample in a small cointainer and measured. I do this every other time I make water. It was 0 two weeks ago and now is at 75.
01/12/2009, 07:33 PM
If you let it run before taking the sample, then tds creep water isn't the issue.
How about the container you used for taking the sample?
I'm just brainstorming here because what you report is unusual.
What is the tds of your RO water? Your tap waer?
01/12/2009, 09:06 PM
Did you flush the system?
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