When my wife announced that she was pregnant last night I realized I needed to make some chsnges in our home.  She has always worked out and as a result drank lots of tap water out of our sink.  This has always bothered me,but now with her being pregnant I knew I needed to make some changes.  I went on line to look at the availble water filters.  I eventually found the aq4000 water filter and felt very comfortable with this filter.  It installs in seconds on standard kitchen sinks.  The cost versus the benefits are awesome. It costs about ten cents a gallon.