View Full Version : Ro/Di

09-05-2015, 11:58 AM
So I set up an Ro/Di unit. Out of tap is 250 or so, and before Di is about 20. The Di cartridge is almost new...maybe 100 gl, and the resin has completely changed color. TDS is up to 2 from 0. Is it normal for it to last such a short time??

09-05-2015, 12:04 PM
If your RO membrane is used up. You will burn through DI resin pretty fast. I have even gotten bad DI resin before. Burned through it in a week.

Coral Xpressions
09-05-2015, 01:30 PM
20 coming out of rhe membrane is really high. My tds goes into my until at 620 and comes out of the membrane at 8

09-05-2015, 10:31 PM
I agree, mine comes out of the membrane around 3-4 so coming out at 20 will burn the resin faster. Also how you make the water will also burn the resin faster. Make large batches at one time as opposed to constantly making water will save the life of the resin. Also if you have a flush kit you can save the life of your membrane. Make sure you change your sediment and carbon filters when appropriate as that will help save the membrane as well.

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09-06-2015, 12:57 PM
I just checked the psi. about 55, which seems maybe a hair low, but should be ok. Time for a new membrane I suppose