Aimex Water Dispensers/Purifiers are a gravity fed water filtration system that provides a consistent supply of clean and healthy drinking water. ;Its 8 Stage Filter Cartridge not only removes all of the nasties but replaces them with minerals vital to a healthy body. ; Enjoy unlimited clean drinking water at home or in a work setting with our cost effective, easily maintained and reliable Water Filtration System. Please soak filter and pads in water overnight, to remove the air in between the particles and material inside before use. 2. In event of extremely slow filtration, please rinse the filter with warm water, not boiling water. ; 3. If your filter appears to be turning green, rinse with warm water and take care that the unit does not stand in direct sunlight. 4. If water flows over the middle ring, it may be because of the activated carbon is blocked. Simply rinse the filter with warm water (not boiling water).