If you have a reverse osmosis system in your home you need to change filters. Read up on the brand you have and be sure to follow the instructions and change it, this will keep the water flowing. Also you will need to change the membrane since on so many units you only do every four- or five-years people seem to forget it. The membrane is what makes the water into bottle quality water, it will remove 97.6% of everything. The other filters remove the chlorine, herbicides, pesticides, and organics but for it to be bottle quality the membrane must be functioning. Read More