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tito
03/09/2006, 02:53 PM
I recently purchased a new ro/di unit from http://www.thefilterguys.biz/ro_di_systems.htm (the unit on the bottom w/ 2 di units) and am running into some problems. I recently moved into a house with city water (240ppm) and no water softener and have already burnt up 1.25 di cartridges to make only 100 gallons of water. What would cause the di to get exhausted so quickly?
glaudds
03/09/2006, 03:54 PM
What is your TDS coming out of the RO? Could be your membrane is shot...is it a new unit?
tito
03/09/2006, 04:29 PM
The unit is brand new. My tds out of the ro is around 8-10ppm.
Billybeau1
03/09/2006, 04:35 PM
Wow a Bears fan from Minnesota. Cool :D

When you say you burned it up already, are you saying your TDS out of the Di is high ?
tito
03/09/2006, 06:15 PM
Billybeau1 - DA Bears! I am still getting 0 tds out of my unit because I have dual DI cartridges. The first cartridge and 1/4 of the second have already been exhausted (turned amber). I stiil have 3/4 of the second cartridge left.
Billybeau1
03/10/2006, 08:52 AM
Well mine changed color pretty quick but continues to produce 0 TDS. I wouldnt worry about the color change as long as your TDS is 0. 240 ppm out of the tap is not that bad. I've seen a lot worse. :)
tito
03/10/2006, 08:58 AM
Billybeau1 - I moved from a town 5 miles down the road and my tds readings went from 450ppm to 240ppm.
Billybeau1
03/10/2006, 09:08 AM
I consider myself fortunate. My tap is 115 ppm. :D
Wryknow
03/10/2006, 10:20 AM
Just keep testing the water production. If you have a dual stage DI unit (separate Anion and Cation) then you can probably manually recharge the cartridges instead of buying new ones.
fahz
03/10/2006, 03:59 PM
Tim as I indicated in the PM check you tap water PH if it is five or lower you would have high CO2 levels which will exhaust your DI very fast. Your system and membrane seem to be working correctly.

Fahz