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Distilled Water Shootout!

post #1 of 7
Thread Starter 
Details

Summary:

Electrical conductivity or EC is a commonly used indicator to measure water purity. While conductivity itself isn't the only measurement goal, total dissolved solids (TDS) in ppm (Parts per million) are also routinely converted from this number. To keep it simple, I'm just measuring the conductivity in this test and including a conversion table that was included with the meter to TDS if you are so inclined. Distilled waters typically should be better than 10uS where municipal water systems could be as high as 500-800uS. In water cooling we have had all sorts of numbers thrown out there with suggestions that grocery store distilled wasn't good enough. In addition there was not any data in regards to how quickly this water becomes ionized in the loop which is important when considering the relevance of purity.

Wal-mart brand amongst others tested extremely pure at under 1uS
waterquality02.jpg?w=614&h=721


Ionization tests

Just a few minutes of metal contact agitation:
waterquality07.jpg?w=614&h=621

Few weeks not quite a month in the loop:
waterquality09.jpg?w=614&h=738

Charted Results:
distilledtestingresults3.png

Conclusion as of 3-24-12

1) There is no such thing as Nonconductive fluid, all no matter how pure instanly become conductive. You spill it you have problems.
2) Tap, Spring bottled, and spring drinking waters are not recommended due to higher ionic concentrations of unknown contents. At least with distilled the ions are metals that match what the loop is made of.
3) Any distilled water or ultra pure water is ok, there is a measurable difference in the bottle by a few uS, but there is no practical difference once added to the loop. 1uS or even 5uS doesn't matter when the ionization jumps to 20 instantly and 80 in just a few weeks
.

Distilled is distilled.

Cheers!:toast:
Martin
Edited by Martinm210 - 3/24/12 at 9:43am
    
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post #2 of 7
Any data on de-ionised? Distilled is hard to get here in the UK, so I use de-ionised instead. Wondering how that compares?
De-ionised - aka battery or steam iron water.

Edit: By the way, this could do with a sticky.
Edited by allikat - 3/22/12 at 9:57pm
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post #3 of 7
Thread Starter 
I was looking for that but didn't find any..maybe need to go look at a grocery store.

I did test this which is reverse osmosis, filtered, and ozonated:
waterquality06.jpg?w=614&h=590

If I can find some deionized..I'll buy some and try it.
    
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post #4 of 7
you'd probably have to go to a autoparts store, it's usually sold as battery water
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post #5 of 7
Thread Starter 
I tried two autoparts stores today, one said use "Tap", the other said go to Wal-mart to get "Distilled". I rounded up a few more samples and calling this done for now..
Updated the OP chart with the new additions.

Cheers!..smile.gif
img}
    
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post #6 of 7
Holy cow look at that filthy tap water, I'm sure my tap is ten times as bad wink.gif!
post #7 of 7
Thread Starter 
Yeah, 200 is actually pretty clean. I looked up some table definitions and it's actually typical to see anywhere from 500-800 uS for municipal tap.

It's really not so much that tap is dirty, but distilled it extremely clean to the point of being ion hungry is how a lot of articles talk about it. In distilled levels it's very much a solvent looking to ionize.smile.gif
    
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