Water Distiller

Purified water is water that comes from a source that physically processes it to remove impurities.  Distilled water (which comes from using a water distiller) and deionized water are two of the most common forms of purified water.

Distallation

Distilled water has virtually all of it's impurities removed through the distillation process.  The distallation process involves boiling the water and then condensing the steam into a clean cup.  This therefore leaves virtually all of the solid contaminates behind.  A water distiller produces very pure water, however it also leaves a leftover white or yellowish mineral scale that requires the water distiller to be frequently cleaned.

Double Distallation

Double distilled water is prepared by the process of double distillation of the water.  It has been historically used for the de facto standard for highly purified laboratory water to be used with biochemistry and trace analysis until combination methods of purification became widespread.

A water distiller is a great way to purify your household water and be sure it is safe to drink.  Water distillers are common place these days and are extremely cheap to purchase.  Depending on factors such as quality etc. a household water distiller can be purchased anywhere from $100 to over $1,000.  Although this may seem like a lot to outlay you would be surprised how cheap it will amount to per litre over a period of time compared to soft drink or other unhealthy drinking options.

Other Facts

Solar power has been experimented with in water distiller use.  This is because of the cost to heat the water.  Solar power is therefore thought to be a low cost & environmentally friendly way to distil water in comparison to traditional power. 

Water Consumption

There have been studies done that reveal more than 75% of Americans are dehydrated.  This leads to all sorts of problems.  A water distiller is a great way to ensure you are getting your correct amount of water every day and is in it's purest form.  However it has only really been successful with small amounts of liquid.  It also requires a much greater amount of time in comparison to using traditional power sources for water distillation.

References:

"Purified water." Wikipedia, The Free Encyclopedia. 11 Jul 2008, 11:58 UTC. Wikimedia Foundation, Inc. 14 Jul 2008

http://www.historyofwaterfilters.com/distillation-process.html