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Old 02-12-2006, 04:07 PM   #1
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RO DI Question


I have asked this before and recd a little feedback but want to ask again. I have a 4 stage RO DI system and am having to replace the filters pretty frequently. I found the sediment and carbon block fairly reasonable at Sams Wholesale per the suggestion of someone here.
Also per a couple of you - you are buying resin and simply buying a blank filter cartidge and refilling it once its worn out. Im going that route. My questions are these..
-how do you know when the resin is exhausted? I have one of the filters that says it will turn a color..is that color red?
-ALso where do you find the resin in bags? Someone mentioned AWI.com and that is the only place I have been able to find it in bags...I need a couple more place.
Any and all help is appreciated

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Old 02-12-2006, 06:31 PM   #2
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You need a TDS meter to check the water and that will tell you when you need to change out the resin. 0 is waht we want on a TDS reading, I run my filters up to 16-19 on the TDS. As long as I have 0 PO4 and NO3 I keep using the filters. Some guys change it out as soon as it starts going up.

AWI has some good resin and so does resindepot, I have used them both.
the color is a orange when its used up. But get none color change and a TDS meter. The non color change is usually cheaper.
I picked up the in-line TDS meter from AWI and I love it..
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