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distilled or deminerialised water?

post #1 of 8
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As the title suggests which is ideal deminerialised or distilled water? what's the difference if any, most say distilled but I've spoken to a few long time water cooling veterans and they both said demineralised. I've used demineralised in my old CPU loop and it was fine, thoughts anyone?
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post #2 of 8
almost the same, where I'm at they sell 99% pure demilitarized water, it wont "really" matter imho. wink.gif
post #3 of 8
Yeah, I use "dionized" water from the closest supermarket. smile.gif
    
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post #4 of 8
Technically distilled is purer. How much purer depends on how good the filter was for the demineralized and how many times the distilled was boiled off. Since both are generally dirt cheap, just use distilled unless its not available in your area.
Edited by Zero4549 - 8/10/13 at 5:56am
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post #5 of 8
My company produces demin water and/or drinking water from seawater. The demin water we produce is ultra pure and it is used for industrial purposes in applications that have extremely low tolerance requirements. Demin water is actually better for our purposes in PC cooling due to it's lower electrical conductivity. The differences are, distilled conductivity is 11 µS while you can find demin water around 0.09 µS or lower. The only retail demin water that I would buy is Mayhem's Ultra Pure. From what I have read of his process, he has a number of filtration steps that resemble what we do and his conductivity is 0.05 µS. Obviously distilled water is perfectly fine to use and it is cheap, but since water is my business, I use demin.
HTH
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post #6 of 8
And 15 minutes after running demin water or distilled or deionized through a copper waterblock and rad, they will all test near same conductance as all will rapidly pick up ions, and all be significantly higher than what you started with. Which is why you just use whatever is available and convenient, distilled, deionized, demineralized, etc, and use a biocide.

Martins testing showed 2 minutes in a radiator, water went from 0.7 us to 19.5 us.
http://martinsliquidlab.org/2012/03/22/distilled-water-shootout-water-purity/3/

Government did testing in how rapid water becomes ionized and conductive when researching for fuel cells, just to lazy to find it, though have linked it many times before.
Edited by opt33 - 8/10/13 at 7:42am
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post #7 of 8
^ Exactly. As long as the water is free of microbes it'll all be the same, so buy whatever is cheaper in you region.
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post #8 of 8
Don't bother, they're effectively the same for watercooling.
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