Aqua Green  Water filtration system is designed for reliable operation when it is connected to the water supply pipe at a pressure of 1 to 8 Bar. A larger value of the pressure requires mounting the reducer. We’ve discussed the basics about the stages and costs of water filters. Next is we’ll dive deeper into the different stages on how contaminants are being removed from drinking water. This way, you’ll know for sure that you’re paying your money’s worth. Here are the common stages. Removal of dirt, dust and sediments, Removal of chlorine, heavy metals and other substances, Removal of bitterness and bad taste.