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Watsan Natural Water Purifiers are built using state-of the art nano-technology filter medium derived out of natural siliceous and earthern ingredients and is licensed by IMMT (CSIR – Council of Science and Industrial Research) Institute  with the trademark name Terafil (TM, C) and is approved by the Department of Science and Technology (DST) India.


  • Removes arsenic, meeting IS 10500 standards
  • Electricity free
  • Zero water wastage
  • Retains all essential minerals and salts needed for the body
  • Rinse, clean and maintain the nano-clay candles, no other maintenance necessary, life long performance!
  • Approved and accredited by 4 premier institutions of GOI: DST, CSIR(IMMT), CIPET and IIT Madras

Watsan Arsenic water purifier

  • Containers made of Polypropylene (food grade) at CIPET centres, a premier plastics Institute, (Government of India undertaking) moulding facilities.

    Check for Original Terafil Water Filter with Government Logos and embossing of DST, CSIR, CIPET, IIT -Madras on the container body, made only by Watsan.

    • Country of Origin: India
    • TDS not an essentialparameter as claimed by R.O systems and now banned by Supreme court. The ONLY purifier which retains essential natural minerals in drinking water, which builds immunity and bone strength.
    • Suitable for purification of natural source pond, river, tank water or tap water/ municipal water supply.
    • Capacity: 15 litres top container, 15 litres bottom container, rate of filtration: 5 to 10 litres per hour depending on the turbidity levels of the water.
    • Special feature: Can purify flood water into potable water.
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