Water distillation 101 |The basics and the nitty-gritties

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What is water distillation?

Water distillation is a water purification process of boiling water into vapor form and then condensing it back into liquid form in a separate container.

It is believed to be the oldest water purification method known to mankind and dates back to as far as the times of Aristotle, somewhere around 384–322 BC.

What is water distillation
Source merckmillipore

Water distillation history

Alexander of Aphrodisias clearly laid out how water distillation was used in the ancient times to desalinate ocean water since 200 AD.

Although it was discovered around 200 AD by ancient philosophers, the practical use of water distillation became common during the World War 1.

The only water available for the soldiers was sea water, but it was impossible for these men to drink directly from  the sea. So the soldiers came up with a special way of making that salty and contaminated sea water drinkable.

That is when and how the ancient discovery of water distillation became more practical and popular .When there is a real need, mankind prove to be so creative and think faster

Water distillation process

Water distillation process copies from the Mother Nature .In nature, the sun heats water found in rivers and streams .The water turns into vapor and rises to the skies leaving behind all contaminants and ultimately forms clouds.

the water cycle is the mother of water distillation
source – conservationinstitute.org

When the upper atmospheric temperature drops, the clouds or vapor condenses back to water in the form of rain. Once the water droplets have fallen down in the form of rain, the whole cycle starts all over again.

Water distillation is a physical separation process and not a chemical reaction as many might be tempted to believe

Just as in the rain making process, water is boiled until it starts producing a vapor.

Because other contaminants in water have a higher boiling point than water, they are left behind in boiling water.

The vapor is collected into a separate container where it cools down and condenses back to water, which is in its purest form.

 No matter how sophisticated a water distillation method might appear; all these methods follow the basic principles described above.

How to make distilled water

If you fear that your municipal water might not be safe for drinking, or you are camping outdoors in the woods and you running out of clean and drinkable water, or you want to use water in a hospital setup where sterility is very critical, then the water distillation guidelines below might be very handy for you.

water distillation in the lab
Source –medium.com

Water distillation apparatus

The apparatus needed for water distillation depends with the scale of distillation which suits your needs. The apparatus needed to make distilled water at home and at commercial level are actually different is size and complexity.

The differences in size and complexity between home water distillation and commercial water distillation also mirror the differences in costs of acquiring the apparatus.

Water distillation Laboratory setup

The apparatus needed include a burner used to heat water.

A distilling flask is the one used to store the water to be heated by the burner and also to volatilize the water. It is advisable to have a rounded bottom flask as it ensures smoothness of boiling than a flat bottomed one 

A thermometer is needed to make sure that the temperature in the distilling flask is not more than 100 degrees Celsius. If any temperature above 100 degrees Celsius (the boiling temperature of water) is detected, the intensity of the fire must be reduced.

If the temperature goes beyond 100 degree Celsius, other contaminants and minerals which evaporates above the boiling temperature of water will start evaporating with water making the distilled water harmful again

water distillation apparatus
Source – Plymouth State College

The condenser is the one which cools down the vapor from the distilling flask thereby converting it back to liquid form .

The condenser should be connected to a reliable running water source to cool down the vapor .The inlet hose which feeds the condenser with cool water should be as far as it can be from the distilling flask. The outlet hose of the condenser can be nearer to the distilling flask, there is no problem.

Racks are very important in making sure that other apparatus do not fall over

The last and one of the most important apparatus is the receiving flask .It is usually made out of glass. It should be clean and if possible sterilized to make sure that the collected distillate (distilled water) remains as pure as it can be

Water distillation home setup

There are many methods of distilling water at home. Here i am going to mention the water distillation apparatus used in the most popular method of distilling water at home which I will elaborate in a moment

How to do water distillation at home
source- whenandhow.com

For this method, you will only need a 5 gallon (approximately 19 liters) stainless steel pot .This is where you pour the water to be heated

The second thing you need is a glass bowl. This is for collecting the distillate (distilled water)

To heat the water, you need a hot plate which is adjustable

A lid. This ensures that water reaches its boiling point faster and also used to put ice on it to create a condensation effect.

Water distillation at commercial level

At this level, distilled water is now produced for the masses .So you can imagine how huge and sophisticated the water distillation apparatus should be.

water distillation at commercial level
Source – indiamart.com

Boiling chambers are the most common apparatus you find in any huge commercial water distillation plant. Water in the boiling chambers is super-heated to produce a vapor. This apparatus is the one commonly used by commercial distillation plants as it can produce millions of gallons of distilled water per day.

At a fairly small commercial water distillation plant, you might find a vapor-compression distiller .This apparatus is rarely used by huge commercial distillation plants as this can produce distilled water which ranges from 25 to 5000 gallons only per day.

How to make distilled water easy at home 

There are a lot of reasons why people need distilled water at home. You might need distilled water for watering your plants in your garden, preparing baby formulas, cooking among many other reasons.

Below I am going to explain the most cost effective and convenient method of making your own distilled water at home.

The apparatus you need to make distilled water at home are very simple, they are found in almost every household. These include a 5 gallon stainless steel pot, a lid and a glass bowl. Don’t forget the stove to heat the water of course.

The first stage is to fill the pot about halfway full with the water to be distilled.

The second stage is to suspend a glass bowl in the water. Make sure the glass bowl doesn’t touch the bottom of the stainless steel pot. If the bowl doesn’t suspend well in water, you can remove it from the water and try to put a clean round baking rack right at the bottom of the pot. You can now return the bowl back in the water.  

The next stage is to boil the water. You have to close the lid until water comes to a boiling point; the boiling becomes faster that way. This ensures that chemicals with a lower boiling point than water are evaporated before you start the distillation process. These chemicals include methanol and ethanol

The next stage is condensation. You can achieve this by closing the pot with a lid upside down. The lid should be inverted and put some ice blocks on top.

Condensation happens when the hot steam underneath heats the cold lid. The condensation will drip feed into the bowl in the pot. This stage continues until you have collected enough distilled water for your needs.

Make sure the condensed water in the bowl doesn’t boil. If you notice the condensed water boiling, lower down the heat on the cooker .This ensures that only the pot water is boiling.

When you have collected enough distilled water, then switch off the stove .You can now take the lid off the pot

Remove the bowl of distilled water safely out of the boiling water .Make sure you don’t burn yourself in the process, be cautious. To be on a safe side, allow the water to cool before you take the bowl out of the water

The last stage is to cool your distilled water before storage

Here is a detailed video on how water distillation can be done in the comfort of your kitchen ,using apparatus which you already have.

How to make distilled water for batteries

Batteries need about 0.1 gallons to a gallon depending with the size of the battery.

water distillation for car batteries

The home water distillation described above might be enough for small to medium sized batteries. For larger batteries, you might need to consider a counter top water distiller.

How to make distilled water for CPAP

You don’t need much distilled water for your CPAP humidifier. You might need less than a liter of water to use with your humidifier every night.

water distillation CPAP humidifier
source – sleepzoo.com

So the most convenient way is to just use a counter top water distiller or using the home water distillation method described above

How to distill water for plants

You might need around 50 to 100 gallons to water your medium sized home garden. A counter top water distillation unit won’t stand the challenge that much. The biggest counter-top water distillation unit I found so far produces around 1 gallon per 5.5 hrs.

water distillation or plants

So it is advisable to get your distilled water from a vapor compression distiller which can produce around 50 to 800 gallons per day. I will explain the vapor compression water distillation process below.

How to make distilled water with a kettle

You can hardly collect a 100 ml bottle of distilled water in an hour. That’s how slow the process is when using a kettle. Anyway let’s just see how you can get distilled water using this method.

water distillation using a kettle

First of all, fill the kettle with tap water.

Heat on medium for approximately 10 minutes until the water comes to a boiling point .This is to ensure that ethanol and methanol evaporate if present in water

As the water boils for about 10 minutes, it’s time now for water distillation to start.

Close the nozzle of the kettle .Open the lid.

Replace the lid with a Tupperware container. The steam will be caught by the Tupperware container. The vapor will eventually turn into liquid as it condenses.

 Check after 5 minutes; pour the little distilled water that would have collected into a separate clean container.

Put the Tupperware container back on the kettle again and repeat the process until you gather enough water for your needs.

 It is a very long and tiring process, believe me.

Here is a video to explain this process below courtesy of CarnivorousPlants57

Types of distillation plants

Mainly there are 2 types of distillation plants. The boiling chamber and the vapor compressor plants. The two are explained in greater detail below

Water distillation plant process- Commercial or industrial level

Basically there are 2 water distillation methods at a commercial level .The two methods are vapor compression and boiling chamber method.

Both methods use boiling chambers as the first stage and then differ from the second stage going forward .I will explain each and every method in greater detail below

Vapor compression method

Water is super-heated in the boiling chamber by 2 heating elements to produce steam or vapor. Just before the water reaches boiling point (100 degrees Celsius), the compressor is turned on

vapour compression method( water distillation)
source – aquatechnology.net

The heating element #2(the one which produces much heat than the element #1) is automatically turned off as the water reaches the boiling point .Heating element  #1 takes over

The function of heating element #1 is just to maintain just the right temperature for optimal efficiency .So the element #1 cycle ON and Off from that moment on .

The steam escapes the boiling chamber via a baffling system before it reaches the compressor located at the top of the boiling chamber.

When the vapor reaches the compressor, the steam is subjected to a lot of pressure. This pressure forces the temperature of the steam to increase exponentially

The pressurized and extremely hot vapor is channeled through a boiling chamber. The temperature of the feed water in the boiling chamber is lower than that of the hot and pressurized vapor coming from the compressor. 

As the hot vapor is routed through the boiling chamber, there is an exchange of temperatures between the steam and the water in the boiling chamber

As steam gives up its latent heat of vaporization to the surrounding water in the boiling chamber, the water boils more, resulting in more steam produced in the boiling chamber.

As the steam gives up its latent heat, the steam passing through the boiling chamber condenses back into liquid form. At this stage, the condensed water is still hot.

Just outside the boiling is a specialized apparatus called the heat exchanger .

The heat exchanger receives cool water from main water supply before feeding it into the boiling chamber. The other function of this apparatus is also to cool down the temperature of the hot distillate as the name suggests.

vapor compression water distillation method
source – pharmaceutical-technologies.com .This is how it looks like in real world

The hot condensed water is then routed through the heat exchanger where a further exchange of temperatures occurs. The hot distillate is cooled down by the heat exchanger before it’s collected on the other end, ready for use.

As the hot distillate give up its heat, the water in the heat exchanger is preheated before it’s fed into the boiling chamber. This is an energy saving mechanism as the preheated water will use much less energy to reach a boiling point

Multiple chamber distillation method

This method utilizes a couple of boiling chambers to make distilled water.

The first chamber is the one subjected to intense pressure and the pressure subsides with every successive chamber

The steam in the first chamber is super-heated way above the temperature needed to produce steam in the successive lower pressure chambers.

As the steam moves along the pipes surrounding the successive lower pressure chambers, some of the low pressure and cooler water is turned into a vapor. The vapor ultimately condenses into distilled water.

Distilled water uses

1.Distilled water is used for drinking .It is the most ideal water or drinking because it doesn’t have any contaminants neither does it have any inorganic minerals .The human body ends up wasting a lot of time and energy to get   rid of these  inorganic minerals.

2.Can be used for laboratory experiments. Because the ph. or acidity of distilled water is close to 7(neutral), the accuracy of laboratory tests results is guaranteed.

water distillation produces water that is suitable for laboratory experiments

If there is even a small change in the ph. of water used in experiments, the whole test result is altered. This is how important water distillation is in the laboratory science field.

3.It is used for making cosmetic products. Because cosmetic products are to be applied on the skin, the water must be as pure as it can be so as to avoid skin irritation.

4.Can be used for making baby formulas. Distilled water is the most ideal to use because it does not have any contaminants. This is because the gastrointestinal tract of a little baby is still delicate and might not tolerate any contaminants as an adult do.

water distillation produces water that is suitable for making baby formulations

So if you have a little baby at home who is still taking baby formulas only, it’s highly recommended to get a water distillation unit or making your own distilled water in your kitchen

5.Can be used for washing your hair. Tap water contains chlorine, calcium, chloramine and magnesium. These chemicals (chloramine and chlorine) and minerals (magnesium and calcium) have been proven to be detrimental to the health of your hair.

water distillation makes water that softens your skin

The minerals mentioned above are positively charged, I think you can recall this from your high school chemistry class. Because these minerals are positively charged, they tend to attach to the proteins which make up your hair follicles .As these minerals attach to the proteins each and every time you take a shower, a build-up of these minerals is created.

The build-up of these minerals will create a barrier which inhibits optimal absorption of hair care products whenever you apply them to your hair.

The calcium and magnesium also leaves your hair dry, heavy and frizzy. These two minerals can also clog your hair follicle, which ultimately lead to hair loss and breakage.

Dandruff is also one of the adverse effects these two minerals, simply because of flaking caused by lack of moisture

Chlorine and chloramine can also cause discoloration and damage of your hair follicles. So you see how important it is to get yourself a water distillation unit or making your own distilled water at home for washing your hair

6.Can be used by CPAP humidifier users. CPAP is an abbreviation which stands for continuous positive airway pressure. It is a treatment for individuals who have obstructive sleep apnea. A face mask is worn at night by the sufferer and then connected to a CPAP machine that supplies pressurized air into the airway so as to keep it open while the sufferer sleep.

 A CPAP Humidifier adds more moisture to the airway so as to alleviate the irritation of the nasal passages.

Distilled water is necessary as it ensures a lengthy lifespan of your CPAP humidifier and CPAP machine.  This is because distilled water prevents mineral build up in these machines.

7.It is used for nasal irrigation. For hundreds of years, the Neti Pots have been used in the medical field to clean nasal passages of almost all the unwanted materials that causes congestion.

The cleaning of the nasal passages also helps to relieve sinus headaches. It is highly recommended to use only distilled water to dissolve the sinus mixture to be used in the Neti Pot .This is because ordinary tap water might irritate your nose

8.Can be used in the automotive industry. Distilled water can be used for cleaning and cooling down car engines as it does not have any compounds that might corrode some parts of your car.

Some car owners might actually prefer washing their cars with distilled water as it does not have water hardening minerals like calcium and magnesium .Calcium and magnesium encourages lime build upon a car engine and body.

water distillation makes water that is suitable for washing your car
Car wash using distilled water

Distilled water is soft water; it prevents lime scale build up. Distilled water can also be used to top-up lead batteries which are the most common type of car batteries to date.

9.It can be used in canning horticultural produce. Distilled water is the most ideal because it maintains the actual taste and color of the canned food.

10.Distilled water can be used for conducting laboratory experiments .For any experiment to produce accurate and credible results, distilled water is used as it does not have any living micro-organisms neither does it have any compounds that might affect the result of the experiment

11.In the pharmaceutical industry, distilled water is used in almost all extemporaneous preparations.

water distillation makes water more usable and acceptable in pharmaceutical preparations

For example, common solutions used to clean small and huge wounds are prepared using sterile or distilled water as it gets in contact with human skin. Any bacteria in the solution might make the wound septic, so the solution must be sterile.

 As a Pharmacy Technician myself, I know this fact very well.

12.In surgery, distilled water is used to stop the growth of any bacteria on surgeons’ hands before an operation .After washing their hands and arms, the surgeons rinse their hands in distilled water to discourage growth of any bacteria 

13.It is the most common type of water used by dentist. After extracting a tooth from your mouth, the dentist cleans away all potential bacteria.

water distillation makes water usable in dental surgeries

Distilled is the one which is also used to cleanse the equipment that would have been used in the extraction process.

14.Can be beneficial for those with HIV/AIDS. Since one’s immune system becomes weak when infected by HIV/AIDS, those with this infection tend to be at a high risk of becoming sick from impurities found in regular tap or well water.

Distilled water benefits

1. It helps in preventing mineral build up in water using machines or machines that are constantly exposed to water .A build-up of calcium and magnesium shortens the lifespan of these machines due to corrosion

2. Water distillation removes all harmful microbes including bacteria and viruses from your drinking .

water distillation removes bacteria and viruses

If you suspect that your drinking water might be infested with these harmful micro-organisms, then water distillation might be the right way to go   

3. Cooking with distilled water makes your yummy dishes cook faster than usual. Distilled water is stripped off of all water hardening minerals like calcium and magnesium.

Heating hard water takes much longer because of the presence of hard minerals which need to be heated first before the water is heated. So with soft distilled water, the stove has a task of the water only.

water distillation makes water more usable for cooking

Heating water only without minerals shortens the time it takes to boil your water. If boiling tap water takes 10 minutes, then it might take about 7 minutes or less to bring distilled water to a boiling point.

A shorter cooking time also translates to significant savings of energy (electricity) .It might also translate to a longer lifespan of your pots and pans.So this is one of the benefits that a water distillation unit can bring to your kitchen.

It helps prevent the spread of water bone diseases. Distilled water is just water and nothing else, no micro-organisms can be found in this type of water. Micro-organisms and parasites starts their life cycle in the host, that is your body, when you ingest water with them

Contaminants are completely removed in a safe way. Distilled water doesn’t have harmful chemicals, pesticides, heavy metals as well as radioactive elements.

Helps prevent diseases caused by chemical contaminants found in unclean water. Water contamination with nitrates is believed to be the main reason why there are so many cases of child birth defects. These child defects include cleft palates and missing limbs among other conditions.

Copper, a chemical that may be found in tap water, is believed to trigger Alzheimer’s disease. So water distillation saves you from these life threatening diseases

Distilled water scientific studies

Water distillation:chemical structure of distilled water
Structural formula of water.The red ball represent oxygen.The 2 blue balls are hydrogen atoms.

Against the common belief that distilled water(without calcium, magnesium and trace elements) is not safe to drink for the long haul, a well-respected researcher on the subject Juzer Jangbarwala, with more than 35 years’ experience on water treatment scientific  studies, has found that distilled water is very safe for human consumption.

In his well-documented research paper, the veteran researcher explains that water is not the only source of calcium and magnesium neither is it the primary source of these healthy minerals.

The daily requirements of calcium and magnesium which are recommended by health experts ranges between 1000 mg to 1200 mg and 300 mg to 400 mg respectively. These figures might vary slightly depending o n age or gender.

By the way calcium helps prevent osteoporosis (a condition in which the bones become weak and fragile)

From the research done by Juzer, hard water contains up to 72 mg of calcium per liter.

So for you to get enough calcium daily requirements of 1000 mg from water only, you need to drink around 13 liters of hard water to satisfy your daily requirements of this bone strengthening mineral. This is just to prove that water is not even the primary source of calcium needed by our bodies.

You can easily get your daily calcium requirement from the following foods: Tofu, milk, cheese, broccoli, cabbage, soya beans etc.

Many people think that distilled water is dead or would have lost its life force. Water is the same physically and chemically whether it’s from the tap or from a water distillation unit.

Water molecule consists of 2 hydrogen atoms and one oxygen atom. Water carries no life force at all, contrary to most people’s beliefs that tap water has more life than water from a water distillation unit.

 So let it be known that water is not alive in any sense regardless of the angle you need to define it. Many scientific studies on this subject will testify to this.

Distilled water vs purified water

Making distilled water uses so much energy than other methods of purifying water. If you are making your own distilled water at home, you have to heat the water in the pot until all of it has evaporated.

On the other hand purified water can be made using reverse osmosis. Reverse osmosis uses much less energy as compared to water distillation methods.

Distilled is completely void of calcium, magnesium and other trace elements. On the other hand, purified water has very limited quantity of these trace elements. The amount of pesticides and trace elements left in purified water depends with the water purification method used.

Unlike distilled water which is tasteless, purified water might contain little amounts of the minerals that render taste to drinking water. So purified water is more tastier than distilled water

Unlike purified water which has limited amounts of contaminants and minerals, distilled water is the safest water you can ever drink on this planet as it does not have any of these minerals and contaminants

Distilled water is the water of preference for preparation of medicines and cosmetics. Purified water might have some few contaminants which can grow in these sterile preparations; the result is that their shelf life will be shortened.

water distillation makes purified water
Purified water

Distilled water vs. spring water

The striking similarity between these two types of water is that they don’t have bacteria or debris.

Unlike distilled water which does not have any trace elements in it, spring water retains all its calcium and magnesium as well as other trace elements

Distilled water might still have chlorine and benzene, if they were in the tap water in the first place. This is because chlorine and benzene have got lower boiling points than water, so they evaporate and condense with the distilled water. So you might need a carbon filter or charcoal filter that removes these two chemicals if your tap water had these chemicals in the first place.

Spring water tends to have that familiar water taste as compared to distilled water which does not even have taste. This is because calcium and magnesium which makes water taste are present in spring water and absent in distilled water.

Mineral water tends to have a ‘fresher ‘smell than distilled water. Water distillation removes all ‘fresh’ smelling minerals from your water. The fresh smelling minerals include calcium, magnesium among others.

water distillation vs mineral water

Distilled water vs. mineral water

Mineral water by definition is that water that is taken directly from mineral springs. This is the most natural water you can buy in a supermarket. On the other hand distilled water is water that would have been made using a water distillation

Mineral water is endowed with many natural minerals and substances .These minerals include calcium, magnesium, Sodium and potassium .On the other hand, distilled water is stripped off of all these minerals and substances that are found in mineral water. Water distillation removes all trace elements, bacteria and even the toughest viruses.

Mineral water cannot be used in laboratory to do experiments as the elements in the water might alter the test result. Water distillation makes your water the most ideal for lab experiments that require much accuracy.

Distilled water vs. filtered water

Both types of water do not have debris

Distilled water is toxin free whereas filtered water is not. Most bacteria and viruses may escape the filter and end up in your filtered water. On the other hand, distilled water is completely void of all micro-organisms you can think of.

Filtered water taste much better than distilled water. This is because filtered water has all its natural minerals which make your water taste better. On the other hand distilled water does not have taste because the natural minerals are absent.

Distilled water feels more ‘soft’ to the touch than filtered water. This is because water distillation strips your water of all the water hardening minerals.

water distillation vs water filtration
Water filter used to filter debris and other visible contaminants in water

Distilled water vs. tap water

Tap water has all its natural minerals whereas distilled water has none.

Water distillation produces water that is much ‘softer’ to the touch than tap water. Most people enjoy taking a bath with distilled water because of the ‘soft’ feel.

Tap water might have some odors from the water treatment chemicals and other debris. On the other hand, water distillation removes all the water treatment chemicals and debris, making it odorless.

Distilled water is less reactive than tap water for dilution

How to make distilled water drinkable

Distilled water is very good for drinking. One downside of distilled water is that it might contain VOCs and chlorine as these are volatile and evaporate with the distilled water. Depending with the amount of chlorine or VOCs available in your distilled water, you might need to buy a charcoal or carbon filter to get rid of these.

Otherwise most our tap water has very minimal amount of chlorine and VOCs, which might not be harmful to your health at all.

FAQ

water distillation frequently asked questions

Is distilled water good to drink?

Yes it is very safe to drink. Although people argue that distilled water doesn’t have calcium and magnesium, and might also lead to early death, veteran scientists have come up with a resolution that distilled water is safe for drinking.

You need roughly 1000 mg of calcium every day. Hard water contains about 72 mg of calcium per 1 liter .So for you to get enough calcium every day from hard water alone, you need approximately 13.8 liters

This is to show you the insignificance of dissolved minerals in water to supply your daily requirements. Significant amounts of these minerals are found in the food we eat every day.   

Is boiled water the same as distilled water

These two types of water are different. Boiled is just your regular water with dead micro-organisms inside whereas distilled water does not contain any dead or live micro-organisms in it.

The similarity is that both types of water are safe to drink. Distilled water does not have micro-organisms and boiled water has dead micro-organisms .So both do not have micro-organisms  .Some  stubborn micro-organisms might actually withstand the heat of boiling water although they are very few if any.

Boiled water still has calcium and magnesium it as opposed to distilled water. Boiled water might not eliminate the effects of hard water, as does distilled water.

Boiled water is normally devoid of VOCs; chlorine etc. provided the water is heated enough to evaporate these chemicals. On the other hand, distilled water might carry these VOCs and chlorine with it throughout the water distillation process.

Is distilled water acidic?

The moment distilled water comes out of the water distillation plant/unit, its ph. is neutral (7) .The water starts to react to the atmospheric carbon dioxide. The mixture of water and carbon dioxide results in formation of carbonic acid.

The carbonic acid breaks into two unstable ions which would be looking for a partner to bond with. The unstable ions make the water acidic.

So distilled water which is exposed to air for about a day will have a ph. of around 5.6, which is slightly acidic.

ph scale acidic,neutral and alkali.water made out of water distillation is neutral
SOURCE
http://h2ocare.com

What is the ph. of distilled water?

It ranges between 5.6 and 7

How to neutralize distilled water

As the ph. of distilled water becomes acidic with long exposure to carbon dioxide, it finally reaches 5.6.

To take the acidic ph. back to 7.0(neutral) requires a reaction of the water with an alkaline chemical like soda ash or sodium hydroxide.

Neutralizing filters are used to neutralize the distilled water. These filters simply inject the neutralizing material to the water and the ph. gradually comes back to 7.

Water distiller reviews

The Megahome counter-top water distiller brief review

best home water distillation unit

Pros and Features

It is an energy saving water distiller as it switches itself off when done with distillation

1 year warranty for the replacement parts.You can have piece of mind knowing that you wont spent money again on this water distillation unit for the next 1 year.

The water distillation unit uses electricity to perform its work .So you cant use it when your house is not connected to the grid or have unreliable power source.

It was certified by Underwriters Laboratory as safe for use at home.Underwriters Laboratory is a trusted Independent science safety company that certifies the safety of various before they hit the market.

Can make 1 gallon of water in approximately 5.5 hours.So you can a maximum of 4 gallons per day,provided you wake up in the middle of the night to manually fill the distiller.So practically it can make around 2 or 3 gallons of pure water per day.

One of the most durable counter-top water distillation systems out there.It is made out of stainless steel

It is very attractive,mainly because of the stainless steel on the outside.

The cost of producing distilled water using this system in the USA is somewhere around 25 cents per gallons.That is saving money!

Removes almost 100 percent of bacteria,viruses and other contaminants

It is user friendly and intuitive.The system can switch itself off when done with distillation.This ensures that the water distillation system doesn’t overheat

It removes all calcium and magnesium,the water hardening minerals ,out of your water.So you can use use soft water all day long.

Its compact size makes it easy to transport it around the house.

It is ideal for a small family of 2 or 3 people.

The water distillation unit doesn’t require any sophisticated maintenance work.Just make sure you clean the inside at least once a month.Also make sure that you let it cool off between uses to avoid overheating

Cons

If you compare it to other counter top water distillation units on the market,it is relatively slower.

The amount of water it produces per day is just good enough for drinking purposes only,you cant use this little amount of water for bathing .

Read full review

The Durastill 4640 water distiller brief review

Pros and Features

best water distillation unit
Best water distiller for a bigger family

It is ideal for a big family of up to 8 people.

It is an automatic water distillation unit.From filling the distiller with water to switching off the distiller when done with distillation,it is completely automatic.

Can produce approximately 12 gallons of purified water every 24 hours.

The Durastill distillers have been on the market for many years and yet people are still happy with them to this day. Durastill has been improving their distillers over time so that they don’t become old fashioned .They have added an automatic feature to the unit,which is one of the greatest selling features of this particular unit.

The water distillation unit comes with castor wheels,making it easy to transport it around the house if needed.

It is made out of stainless steel,making it a very durable asset .

1 year guarantee covering the replacement parts.Avoid being negligent of course as terms and conditions apply when requesting for replacement parts.

A remote faucet can be connected to provide the whole house with fresh and purified water.

Maintenance is very easy and not complicated at all.An average user can maintain it without any need for an expert.The self sterilization feature on the reservoir tank ensures that you continuously get pure water all year round.

If you don’t have a reliable water line supply for auto -fill,you can turn this distiller back to manual-fill by a simple click of a button.

The replacement parts are very easy to get as the water distillation unit and its parts are manufactured in the United States.

The volatile gas vent ensures that all VOCs like chlorine are eliminated from your distilled water.

The pre-filter and the post filter are designed to give an added layer of safety.The pre-filter removes all debris from the water before distillation.The post filter removes all the other contaminants that might have survived all the rigorous water distillation stages.

Cons

It is pricier than most water distillation systems designed for home use.

The main reason for its steeper price in my opinion is its outstanding capacity.I haven’t found any home water distiller which is bigger than this one so far.

Another reason for its higher price is automatic fill feature,you can hardly find any other brand with feature on their home water distillation units.

Of course we cant explain its steeper price without mentioning the material used to make this unit,stainless steel.

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