Hi my name is David. I need a question about filtering. Could you please tell me how filtering works on water? Also could someone please tell me any other method of filtering water?

Have you tried the following types of searches in order to find this information yourself?

Water Filtration Process - Google Search (http://www.google.com/search?hl=en&safe=off&sa=X&oi=spell&resnum=0&ct=result&cd=1&q=Water+Filtration+Process&spell=1)

How Filtering Water Works - Google Search (http://www.google.com/search?hl=en&safe=off&q=How+Filtering+Water+Works)

Teachers' Domain: Earth Water Filter (http://www.teachersdomain.org/resources/ess05/sci/ess/earthsys/waterfilter/index.html)