The First Stage
The PP Pre filter removes rust, sand, clay and floating substances which are bigger than 10um. Thus it enables to generate effective performance by carbon filter. General total purified water capacity: 9000 L, recommend changing for 3 month.

The Second Stage
The granular activated carbon filter can remove some organic chemicals, pesticides, the floating substances, remnant chloride, unpleasant taste, odors or colors and as well as heavy metal particles. General total purified water capacity: 12,000L, recommend changing for 6 month.

The Third Stage
The block activated carbon filter can remove some organic chemicals, pesticides, the floating substances, remnant chloride, unpleasant taste, odors or colors and as well as heavy metal particles. General total purified water capacity: 12,000L, recommend changing for 9 month.

The Fourth Stage
The Reverse osmosis (RO) membrane can efficiently remove dissolved salts, heavy metals. bacteria and some organics which are bigger than 0.001um ,and the desalinations rate is more than 98.5%. General total purified water capacity: 18,000L, recommend changing for 12~18 month.

The Fifth Stage
The small post carbon filter adjusts water PH value, remove unpleasant taste, odors or colors, and make the water taste better. General total purified water capacity: 12,000L, recommend changing for 12 month.