Reverse Osmosis Water Purifiers: The Topway Global, Inc. (TGI) WIN-445
Who Needs It?
Reverse osmosis water Purifiers: Model TGI WIN-445 is for those who want a low-cost, high-performance reverse osmosis system. It is a great filter for those who want to remove a wide range of contaminants and don't mind the slowness of the process. It is an undersink model which is ideal for homes which have room under the sink.

It's claim to Quality
Because the reverse osmosis water purifiers: model TGI WIN-445 is a reverse osmosis process it removes a wide range of impurities. It is given the rating of "very good" by Colin Ingram, an expert in all aspects of drinking water, in his book, The Drinking Water Book. His system of rating focuses on a filters ability to remove contaminants and runs from "acceptable" to "good" to "very good" and finally to "excellent". "Very good" means it "eliminates almost all potential pollutants". A second indication of high quality is that it is WQA certified. The Water Quality Association is an independent organization which certifies water filters, similar to the NSF, National Sanitation Foundation International.
It's Features/Advantages
- It has four stages: sediment filter, block carbon filter, reverse osmosis membrane and a granular carbon filter. Hence it combines the benefits of reverse osmosis and carbon filtering.
- It gives you 2 gallons per hour or 48 gallons per day of filtered water.
- There is a tank level control for automatic shut off so the 4 gallon storage tank is always full.
- The various filters are easy to change.
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It's Disadvantages
Every kind of filter has its disadvantages. The disadvantages of the reverse osmosis water purifiers: model TGI WIN-445 are similar to those of most reverse osmosis units. The process is very slow when compared to filters that can give you 1 gallon of filtered water per minute. Here your trade off is quality of filtering. The other major disadvantage is the amount of water that is wasted. It takes 4 gallons of water or more to deliver 1 gallon of purified water. A third disadvantage is that the reverse osmosis process, as the distillation process, removes all minerals, not only harmful ones but ones beneficial to your health. (see: "Potential Dangers of Drinking De-mineralized Water")
What Contaminants Does It Remove?
In common with other reverse osmosis filters in combination with a built in carbon block pre-filter, the reverse osmosis water purifiers: model TGI WIN-445 unit removes cryptosporidium, giardia, toxic metals, asbestos, volatile organic chemicals, pesticides, herbicides, uranium, radium, chlorine, fluoride, organic additives, hydrogen sulfide, dissolved minerals, mineral and organic particles, turbidity, lead, and arsenic. It partially removes bacteria and viruses as well as nitrates and other nonmetals.
Cost
1. Initial cost: $250.00 to $300.00
2. Replacement of sediment filter: $12.00-$16.00 (6 months)
3. Carbon block filter: $15.00 (6 months)
4. Replacement of granular carbon filter: $15.00 (1 year)
5. Replacement of ro membrane: $60.00 (2 years)
Where to Purchase?
Isopurewater.com
At A Glance
| Initial cost | $250-$300 |
| Sediment replacement cost | $12-16 (every 6 months) |
| Carbon block filter | $15 (every 6 months)
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| Carbon granular replacement | $15 (every 1 year)
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| Replacement of ro membrane | $60 (every 2 years)
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| Removes | Asbestos, Lead, VOCs, Radium, Pesticides, Turbidity, Chlorine, Cysts |
For Further Information
To learn more about reverse osmosis filters as well as the possible dangers of demineralized water go to "Reverse Osmosis Water Purifiers".

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