Reliable Water Purifier Repair and RO Service in Kolkata at Affordable Rates Access to safe drinking water is a basic necessity, especially for households in urban areas. In Kolkata, where water quality can vary, installing a water purifier has become a must. Most homes depend on RO (Reverse Osmosis) systems https://visionaryregion096.bloggazza.com/35973297/indicators-on-best-ro-service-you-should-know