A quality water purifier is not hard to come by. A list of basic needs will help you choose the correct model. First, grab a pen(or pencil) and paper. Second, answer the following questions about your water quality.
1) Does your water contain grains or particles visible to the naked eye?
2) Is there a color to your water?
3) Is your water smelly? Rotten egg? Chlorine(like a pool)?
4) Is there much deposit buildup on sinks, in showers? What about spotted glasses and plates?
5) Is your skin feel dry after you shower? Do you use much moisturizer?
Now to put those answers into effect:
If you have answered yes to any of the questions, then you need a filter. Which type of filter is necessary? A purifier which houses a particulate filter and a chemical filter should correct all of the aforementioned problems. A purifier for the whole house should be purchased.
There are many companies which claim to have a superior product in this market. However, most of them are the same and should be considered with a grain of salt.
Look for a sytem which provides both chemical and mechanical(particulate) filtration.
Mechanical filtration is performed by a number of filter pads or floss layers. The first should capture the largest particles. The last is the finest, to capture small particles. These mediums must be replaced occasionally. The homeowner can easily perform this service themselves.
Chemical filtration is most often performed by resin type compounds or activated carbon. These compounds must be replaced on schedule. A company which provides the service for you is often the best choice. Also, consider consumption of salt if your purifier uses it. The best purifiers available should use a compound which must simply be replaced every 3-6 months, and that does not leach back into your water. Most compounds work on an ion exchange, replacing salt compounds for each undesirable removed. In this instance, a separate reverse osmosis/deionization/ultraviolet filter may be necessary for drinking and cooking waters. These filters will provide the consumer with up to 99.99% pure drinking and cooking water.
Water consumption is another factor in the process. The filter you purchase must be able to handle your households daily water requirements. For example, your house uses 500 gallons/day and the filter you purchase only provides 200gallons. You will soon find yourself with no water, as the system cannot produce anymore. Measure your daily requirements for a month. Then look for a system which exceeds your average requirements by 200-300 gallons per day. This will leave you plenty of elbow room.
Finding the correct filtration requirements in a system which meets your daily needs is simple. Follow the above mentioned guidelines and you will surely find the system for you.