Is there any need for the RO+UV+UF system if the RO+UV system is equally good? Drinking clean water is essential for good health. Due to widespread pollution of water bodies and outdated supply pipes in most cities, tap water is no longer a reliable source of water. Most municipalities in India do not have 24×7 supply and limit water supply to a few hours each day, often leading to cross-contamination between sewer lines and water supply connections. Running parallel to this, this can result in contaminated supplies which can cause water-borne diseases such as typhoid, gastroenteritis, hepatitis and cholera. Therefore, every household in India is advised to purify water before using it.