DI question

TheXpander · Oct 23, 2020

Hi!
Yesterday I turned on my RODI system for the first time and after a lot of messing about and some great support from here I eventually found the supplier hadn’t installed or supplied the RO membrane.....
I had ran it for a while without realising this so am wondering if the DI resin will now need replaced? Initial readings were 12ppm and are now at 69? Thanks

Ippyroy · Oct 23, 2020

Is it a color changing resin? Mine turns brown as it is used up.

homer1475 · Oct 23, 2020

From your other thread, first thing I would do is to turn that DI cartridge vertical. With it laying on it's side the water can channel it's way through the DI.

Until you install the RO membrane, it's impossible to tell if the DI is depleted. Just use a TDS meter, if your above 1 on the output, replace it. Sometimes the color changing resin will change color on the outside, but still be fine. Again without a TDS meter, it's impossible to tell.