Gravity Based Purifiers use the simple technology of difference in pressure. Water moves from higher chamber to lower chamber with some filters like germ kill to kill germs and viruses, micro-fiber to filter several dust particles and dissolved salts in water some companies are also using UF filters to clean water from minute salts.

Pro of gravity based water purifiers :

• Do not require electricity for filtering.
• Low cost, can Range from Rs. 1000 – 4000.
• Higher water storage capacity around 7-20 litres.
• Filters are of low cost so easy maintenance.
• Portable and easy to use.
• These purifiers can move easily if you are going for a picnic.