What are the different types of water filters?
Filter pitchers and under-the-sink systems, called point-of-use units, are used to specifically treat water for drinking and cooking. Other filtration systems, called point-of-entry units, treat all water before its distributed throughout the house. Some consumers prefer point-of-entry units because contaminants like radon and organic chemicals can pose a risk when inhaled (as in steam from a shower or dishwasher). Point-of-entry units combat this issue by treating all water when it enters the home.
