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distilled water question

06/30/2023 7:02 AM

I just discarded what remained of a gallon of distilled water from Wal Mart because it was leaving behind a lot of white scale. Most of us assume that distilled water is "pure" water and that after evaporation there will be nothing left. In reality, distilled water in the store is probably whatever made it through the most profitable process of going from liquid to vapor and then condensed back to liquid.

How close to "pure water" is distilled water from a grocery store? Does a distilled water production facility use pressures, temperatures or anything else that would allow something through the process that the average homeowner would not expect? Was this just a defective bottle of distilled water from Wal Mart?

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#1

Re: distilled water question

06/30/2023 7:22 AM

The term <...distilled water...> refers only to its method of production, i.e. by condensing steam. It will typically have a total dissolved solids [TDS] in the region of 1-5ppm, expressed as a resistivity of 0.2-1.0MΩcm at 20degC.

Note that silica will dissolve in steam.

Such water is not even close to absolutely pure water, sometimes labelled "Kohlrausch water", which in theory has a resistivity closer to 18.8MΩcm at 20degC. Such water is conceptually so pure that there is absolutely nothing dissolved in it. Achieving this level of purity is rather difficult.

In practice the microelectronics industry uses copious amounts of "ultrapure water", with a typical resistivity of 18.2MΩcm at 20degC, and it takes a lot of equipment to maintain that purity. Waters of this type are so aggressive that they will readily find anything that they can dissolve, thereby lowering the resistivity. Bugs love growing in this water too, and the only way of maintaining it is to keep it moving. The reason for maintaining this level of purity is that should it fall, the production yield of viable microchips goes down.

A typical large-scale ultrapure plant will have 15-18 stages of processing starting from the incoming town mains water.

If <...distilled water...was leaving behind a lot of white scale...> then it has suffered by being in contact in the past with something that can dissolve into it, and the assumption in the original posting is therefore invalid. Discarding may well be deemed appropriate.

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#2

Re: distilled water question

06/30/2023 3:18 PM

Maybe it's the plastic container that's breaking down....?

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#4
In reply to #2

Re: distilled water question

07/01/2023 5:27 PM

I have wondered about that when the water had a bit of a "plastic" taste--thinking that the bottle itself may have dissolved a bit into the water. This was after it had been sitting around quite a while.

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#6
In reply to #4

Re: distilled water question

07/01/2023 5:46 PM

No matter the process, distilled water will take minerals out of your plumbing and lead to problems.

Heed the words of PWSlack.

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#3

Re: distilled water question

07/01/2023 12:01 AM

Some distilled drinking water has "buffering agents" added for flavor. Should say so on the bottles list of ingredients. This shows up when dried as white flakes or powder.

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#7
In reply to #3

Re: distilled water question

07/01/2023 5:47 PM

You might be thinking of ordinary bottled drinking water, I don't think you can add anything to distilled water and still call it distilled water...

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#9
In reply to #7

Re: distilled water question

07/01/2023 10:22 PM

They call their drinking water distilled. I fully understand that after you add anything it is no longer distilled.

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#10
In reply to #9

Re: distilled water question

07/01/2023 11:18 PM

Electrolytes added for taste? There are very few that get distilled water for drinking, so why does taste matter?

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#19
In reply to #10

Re: distilled water question

07/05/2023 7:10 AM

That sounds like an artificial, or engineered, potable water. One might hope that its bacterial resilience, usually provided by traces of chlorine or ozone, is adequate.

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#23
In reply to #10

Re: distilled water question

07/18/2023 2:34 PM

This is a conspiracy designed to weaken the bones of the west.

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#5

Re: distilled water question

07/01/2023 5:29 PM

Could it actually be "deionized" water? If so, the labeling would be illegal.

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#12
In reply to #5

Re: distilled water question

07/03/2023 7:32 AM

Deionisation can be achieved in a number of ways. Evaporation/condensation and reverse osmosis are the two most commonly-found methods.

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#8

Re: distilled water question

07/01/2023 8:38 PM

My wife has to use distilled water because of a bipap machine with a humidifier. We have bought it for years from several different stores (including Walmart) and have never seen anything in it. It sounds like a quality control process gone very bad.

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#11

Re: distilled water question

07/03/2023 7:30 AM

Water that has less than about 60ppm of Calcium actually tastes 'king awful . It's also not very good for the body, with traces of Calcium and Magnesium being generally beneficial to it.

Drinking water produced from seawater by either reverse osmosis or evaporation usually passes through a re-hardening unit downstream, to put some Calcium into it.

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#13

Re: distilled water question

07/03/2023 8:11 AM

I'm going to give them a call. WalMart has a phone number on the bottle. For the past decade or so I have put dozens of gallons of distilled water in my CPAP machine. There was basically zero residue left after the water evaporated. Now I get a very annoying white coating that flakes off after each nights use. I would guess that is about 4 fluid ounces to create a thin coating of white flakes.

When I am forced to use tap water or bottled water at a hotel I don't get near this amount of residue. I would think that people ironing clothes would have problems with both plugging up the inside of the iron and not having a smooth surface to slide across the clothing.

I discarded the bottle, bought another and still have the problem. Walmart only has one distilled offering, Sams has none and I try hard to avoid the other stores due to everything costing about 25% more for the same thing. I may have to take a trip by myself to another store and buy a different brand. Quite an annoyance for a gallon of distilled water.

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#15
In reply to #13

Re: distilled water question

07/03/2023 7:13 PM

Why don't you just buy your own distillation machine, and make your own...

$60...make a gallon for a fraction of the cost to buy...

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#17
In reply to #15

Re: distilled water question

07/04/2023 3:08 PM
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#14

Re: distilled water question

07/03/2023 1:10 PM

How much does the breathing machine cost you? How much does the DW cost, and the time and bother.....for one year of service?

Even if you use DW for one year, how filthy can the machine get without dis-infection treatment and maintenance? How filthy do the internals, tubing and filters, get from your breath for a year?

Why not use tap water and replace machine yearly? They probably have improvements with yearly models also.

Who would want to breath thru a machine that's 4-5 years old? I don't care how or what cleaned it.

Or use a machine with a peristaltic type action, with a replaceable air transport tubing.

Just an opinion, never saw or used such machine. 'cept on TV.

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#16
In reply to #14

Re: distilled water question

07/04/2023 1:13 PM

Insurance gets involved with a one machine per five years limit if using insurance benefits. Without insurance benefits I think the price is in the range of $800 to $1000. I think that is about $50 for the machine, about $200 for the ink to put "Philips" or another brand name on the box and the remaining $600 or so for the ink to print "medical device" in the manual.

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#18
In reply to #16

Re: distilled water question

07/04/2023 3:13 PM

I had no idea. And I don't doubt your comment. It's a phony racket for sure.

Perhaps some kind of "breath diode" mask. Where the exhale is kept separated from the inhale. A breathing isolator. No reflections sorta speak.

A small nostril mask to seal and keep nostrils pressurized, and an air directional mouthpiece, allowing only air to pass out into room. In thru the nose and out thru the mouth. Let the sinuses filter and set the humidity for the inhale, like normal. And don't forget a drool drain for the mouthpiece.

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#20
In reply to #18

Re: distilled water question

07/05/2023 8:21 PM

The modern machines monitor pressure to detect apnea (stopped breathing). They will adjust pressure as needed to keep you breathing. Most machines run about 8 cm H2O (somewhere around 0.1 PSI if I recall correctly). Some will go up around 16 - 20 cm H2O (about 0.2 PSI) but that is less common.

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#21

Re: distilled water question

07/05/2023 8:24 PM

I called the quality control number on the bottle. They said there should not be any white flakes. I asked what was going wrong. They said "I don't know".

They offered to let me send in the gallon of water. I had already used a little and thrown away the rest. Just as well, I didn't need to pay shipping and wait in line just to find out that I got a bad batch of distilled water. I already knew that.

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#22

Re: distilled water question

07/08/2023 9:11 AM

I have a water distiller that is over 30 years old and is still working fine. It makes 3 gallons of distilled water in 24 hours, but it has an interesting feature: It has a tiny weep hole at the top of the output tube ,to release "volatile condensables". It had a heater element ,similar to a water heater element which I have never had to replace and a timer,(mechanical) which ahs also been problem free. It is entirely Stainless steel.

The distilled water makes a big difference when used to make coffee ,tea or in cooking in general. I can use less coffee or tea ,and actually get a better tasting brew.

And for watering potted plants it is nearly miraculous.

Rain water is no longer pure, it contains acids, radiation, and who knows what else. I also do not trust commercial distilled water because there are no tight regulations on the process or resulting output.

The person I bought it from was a water plant operator who smoked like a steam locomotive.

He would put treated water in a microwave and cook it till it evaporated, and looked at the results.

He then put his distilled water in the microwave and did the same thing...no residue.

He claimed that the undistilled water had absorbed all it could, and had no room for anything else ,and he only drank his distilled water ,he claimed it flushed toxins out of the body and would extend his life. He drank the water everyday.

As I said, he was a chain smoker, lighting his next cigarette from the previous one.

The ceiling tiles in his office were originally white, but they were saturated with nicotine to a dark brown.

I saw him many years later, and he was doing fine, He was 88 years old and looked 20 years younger. He died the next year ,but it was a car accident.

I am not selling these distillers, have no monetary interest in, or affiliation with this company and don't know if they are still in business, I am simply relating my own experience! Take it for what it for what it is worth.

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