Water filters have a long history as a method of water purification, beginning as early as 2000 b.c. in ancient Egypt. Filtration has evolved from the simple Hippocratic sleeve of ancient Greece, made from cloth, to the complicated solid block carbon and multimedia water filters currently on the market. Water filtration is now the premier method of water purification, removing more water contaminants, more efficiently, than any other technique. Filtration is the process of removing solids from a fluid by passing it through a porous medium. Coarse, medium, and fine porous media have been used depending on the requirement. This filter media blocks passage of contaminants through physical obstruction, chemical adsorption, or a combination of both processes. Material construction of the filter media varies widely according to the nature of contaminants needed to remove. The filtration rate depends on the effective size of the bedding and the water velocity through the filter. The flow required for filtration can be achieved using gravity for the residential application or pressure for the commercial and industrial application. In pressure filtration, one side of the filter medium is at higher pressure than that of the other so that the filter plane has a pressure drop. Every filtration unit construct of the following major components