If you use a home made Water vending machine that you know removes all the contaminants, like a distillation system, you're still not going to get it right; if you take out everything, you're removing healthy minerals like fluoride, iron, copper, and calcium. While the levels of these are trace in most water supplies, they do make your water taste better and improve your health when you drink them. In addition, water that has been distilled tastes flat and lifeless, and most distillation systems add their own contaminants. And then there's chlorine; if the water supply you're using has chlorine in it, your distillation system is unlikely to get rid of that, while commercial filters will. \r\n\t\t\t\t\t\t\t\t\t\t\r\n\t\t\t\t\t\t\t\t\t\t\t\r\n\t\t\t\t\t\t\t\t\t\t\r\n\t\t\t\t\t\t\t\t\t 75G\/400G Reverse Osmosis...Read MoreFor those who are still planning to build a home made water purifier, make sure that your filtration system has several layers: sand or diatomaceous earth, a layer of fiber or mesh, activated carbon, another layer of mesh, and then a third layer of diatomaceous earth. These filters work best if water is put through at pressure, after being allowed to settle. Once you've filtered your water, test it by letting a glass sit for a day or so to see if anything settles in the bottom or if the water gets cloudy. You can also send out samples to biological laboratories to have a thorough test done for microbes if you do not get your water from a municipal supply. Unless you're doing something very large scale, it's likely to be cheaper and easier to buy a premade filtration system.water filter purifier on the other hand while affective for removing living contaminants, such as bacteria and pathogens, actually go too far and remove the minerals needed by our bodies that nature intended we ingest to maintain health and vitality. In other words they remove what is bad, but they also remove whats good.While this is definitely not a desirable situation from a health standpoint, this type of Pure water vending equipment can especially be dangerous for children and pregnant women due to their increased need for minerals to help in the formation of healthy bones and organs. This is why you don't want to give your family reverse osmosis filtered water regardless of whether its from a home water filter or overly filtered bottled water. Additionally reverse osmosis filters can also begin to degrade in short order if your water supply contains chlorine, which most public water supplies do.If you want to know more, you can click http:\/\/www.gemeiwaterpurifier.com .