Distilled Water Shootout & Water Purity

Posted: March 22, 2012 in How To & Misc
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Low Cost Grocery Store “Filtered/Purified/Drinking” Water Options

Since it seems “Distilled” isn’t always available in all areas, I figured I would check on a few that were filtered or purified but not distilled.

Next was Wal-mart “Drinking” water which has a different water source and purified by reverse osmosis, filtered, and ozonated.

While not as good as the Wal-mart distilled or Earth H2O, it tested close to the other brands and technically lower than the <10uS distilled wiki definition.

And here a brand name also reverse osmosis, filtered, and ozonated.

Bottled Water Options

Last on the list is looking at a couple of “bottled water” options.

First up is a cheap brand.  I bought a six pack of these for $1 at the Dollar Tree.

Not good.  It is about half as bad as tap water, but not anywhere in the single digit ballpark as the others were.  Better than tap water, but that’s not saying much.

And last and not quite least is a more expensive bottled water. I believe this one cost me about $0.50 for the single bottle.

Also not very good, but better than the cheap bottled water.  The “Enhanced with minerals for taste” part is what’s probably increasing this one.  Regular old distilled water doesn’t “Taste” all that great, so bottled waters add minerals which reduces the water purity to some degree.

Ionization Sensitivity (Mixing Solid Metals With Pure Water)

The next question for me was how easy it is to ionize waters this pure.  Water is a solvent and when water is this pure it is pretty much ionic “Hungry” to the point where ions even from the plastic bottle are jumping in for the occasion.

Test #1 Copper Tee Fitting

This was taking a copper T fitting I had rolling around one of my parts bins and simply tossed it in the cup and stirred for about 30 seconds.

It doesn’t take long at all to take a 1uS water up to 20+ uS using a copper fitting that’s been rolling around the parts bin.

Test 2 Clean Flushed Radiator

I just finished pressure drop testing this radiator, so it’s has a really good powered tap water flushing at very high flow rates.  I figured I’d take this clean radiator, pour in some of the .07uS distilled about 1/4 full and shake the radiator for a couple of minutes.

I thought it would be a little higher, but I guess that flushing/cleaning before hand helps.  Still only takes a couple of minutes to shoot up to 20 uS.

Test #3 Run it in a loop

The third test was to simply draw a little water from my CPU test loop.  It’s been very well flushed over the years with running distilled waters in it, but I have been changing blocks out and getting a little bit of new parts contamination in it over the past few weeks.  I wrote a month down for the photo, but now that I think of it, it has really only been a few weeks.

Wow, that’s an eye opener…ionization occurs extremely fast!

And one last test for fun just because…:)

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  1. Dominic H says:

    I think its worth noting that Distilled water absorbs CO2 from the air VERY fast. This is probably why when you put it through your rad where there is no air it stopped raising its conductivity.

    It is also important to note the temperature of water plays a MASSIVE part in its conductivity, the warmer the water the higher the conductivity so inside a hot loop the conductivity will plummet.

  2. Anon says:

    Our Silver Springs (FL) store brand spring water was 411 uS/cm.