Gravity-Based Water Purifiers is the ideal choice for areas with low TDS. They do not require electricity to operate and are easily available. These water purifiers provide ample amount of chemical-free, safe, and pure water for your family at all times. They use the principle of gravity to purify water. Most, gravity-based water purifiers come with a transparent tank made of ABS food-grade plastic or stainless steel, which consists of two compartments. The water is filtered as it flows from the top compartment to the bottom compartment without the help of any external force. The water flows through the spun membrane whose minute pore size blocks the coarse particles like dirt and dust, bacteria, viruses, cysts, parasites, etc. It allows only the clear and pure water to pass through it. However, it is suitable only for water with low TDS since it is not able to remove dissolved solids or heavy metals.