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 metro regions. In Kolkata, where water quality can vary, owning a water purifier has become a must. Most homes depend on RO (Reverse Osmosis) systems https://vertexgrid220.blogpixi.com/37257402/best-ro-service-things-to-know-before-you-considering-other-options