Brand History and Description : Tata Swach brand of water purifier comes from the house of Tata, one of the oldest, largest and most trusted companies in India. It is present in many other countries in the world too. TSRF is the technology used by Tata Swach brand of water purifier. TRSF uses RHA – Rice Husk Ash with nano-silver particles for water purification. Some of the popular models of Tata Swach are Tata Swach Smart, Tata Swach Platina Silver RO, Tata Swach Nova Silver RO, Tata Swach Silver Boost.