Date: Sat, 16 Oct 2010 18:06:59 -0700
Reply-To: Alistair Bell <albell@SHAW.CA>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Alistair Bell <albell@SHAW.CA>
Subject: Re: Stainless Pipes Determination and Deionized Water Query
In-Reply-To: <AANLkTinDW3ArhBHz_40j2t_YwGu6MBBQQk_Tru0cdA09@mail.gmail.com>
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nope.
I have drank it :)
18Mohm/cm deionised water, pretty well HPLC grade.
in a closed system with coolant, such as a car, no prob using DI
water. One might see an erosion problem in some lines if it was a
constant pass through of non returned DI water.
think about it, think of the solubility in water of the materials you
worry about being dissolved.
I could go on, but supper beckons :)
alistair
On 16-Oct-10, at 5:00 PM, craig cowan wrote:
I was under the impression (though mind you I am not much of a
chemist) that
DI water was actually quite reactive in some situations (Especially
organic). I know if you drink a cup of DI water, you will become
severely
sick as it actively tries to fill it'sself back up with minerals and
nutrients, which it will rob from your body. (Experimentation has proven
this. I'm very cruel sometimes to roommates....).
Anyway, I was under the impression that similar reactivity would
occur on
metals. It may not be a conductor, but it is actively trying to dissolve
things. Much more so than a solvent that is already at capacity (IE Tap
water full of random crap).
My thoughts.
Chemists, please chime in.
I use tap water. And I change it when I can (every few years). And I
have
seen no undue cooling issues.
-Craig
'85GL turned WESTY
BOSTIG in the back
'87SUNROOF Syncro
On Sat, Oct 16, 2010 at 1:46 PM, Derek Drew <derekdrew@derekmail.com>
wrote:
> With all the talk of conductive water in the cooling system and
> stainless pipes, I ran across a bunch of articles saying that you can
> get zero conductivity water by ordering de-ionized water, and then
> mix this with the coolant.
>
> He is a 55 gallon drum that comes with free
> shipping
>
> http://www.boilerandcoolingwater.com/Deionized_Water_ACS_Grade_p/
> dw4000-55g.htm
>
>
> I noticed that some coolant manufacturers are now using de-ionized
> water as part of their premix coolant, and I noticed other coolant
> manufacturer sites recommending deionized water (or distilled water)
> be used with coolant.
>
> This is all a mystery to me as I had though that we are supposed to
> NOT use distilled water as coolant mix.
>
> I have decided to use stainless pipes in my vans, make sure that
> these are NOT grounded to the chassis (Scott!!) or touching it or any
> other metal in any way, and use litmus strips to test the coolant for
> acidity, use Schaeffer's Clean and Cool
> http://www.schaefferoil.com/specialty/258_coolant_additive.html
> additive, and probably, pending what is said on this list about this
> topic, use the deionized water to further minimize conductivity of the
> water.
>
> If somebody could revive the argument against distilled water for
> coolant, I'd like to hear it. Presumably, that argument would apply
> to deionized water as well.
>
> The difference between distilled water and deionized water is subtle,
> but it seems that the deionized water has no conductive minerals or
> substances in it at all, whereas distilled water is not designed to
> be necessarily so after it gets into the container and into your
> house.
>
> The required subaru content of this email is present in that many
> vendors of subaru conversion parts offer stainless elements to their
> conversions. In my view, this shows an admirable concern about
> keeping the vans alive for those of us who drive in winter or wet or
> damp or oceanic conditions and salt, and I would not call such a
> material selection a mistake, but rather a gift that should be
> appropriately managed.
>
> So, in summary, I do not believe that the use of stainless materials
> in the vehicles is necessarily a mistake or serious error, except in
> those cases that the stainless interfaces directly with dissimilar
> metals on the car. I'd be skeptical that any vendor would offer a
> stainless part that bolts or attaches directly to a non-stainless
> part without insulation, and if so, then I think they should be more
> concerned about doing 101-no-nos.
>
>
> _______________________________________________
> Derek Drew
> Founder, ConsumerSearch.com
> Washington DC / New York
> derekdrew@derekmail.com
> 202-966-7907 (Call the number at left normally)
> (alt/cell for diligent calling only): 703-408-1532
>
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