FOR GENERAL PARAMETERS
Packaging | Marking | User manual | Workmanship and finish | Convenience
As per the national standard, packing of purifier shall be robust to ensure adequate protection from transportation damage.
All the brands were found to be suitably packed.
The water purifier shall be marked with details like brand name, production serial number, name and address of the manufacturer, manufacturing date and MRP. Crystal and Unitex were found deficient in providing most of the information. Manufactured/ Marketed by information was not mentioned.
The user manual was checked for installation, maintenance and cleaning instruction, operation instruction, warranty, technical specifications and dual language. Pure It, Aqua Sure, Bajaj and Tata Swach have given all the required information. Crystal, Usha and Unitex have not given the required information.
Workmanship and finish
A five-member panel gave ratings on this aspect. All the tested brands have good to excellent workmanship and finish.
Panel members looked for how convenient the product was in terms of installation, cleaning of filter cartridge and their replacement.
The convenience factor varies from convenient to very convenient.
Based on the overall test results, it is concluded that chemical-based water purifiers gives us clear and almost safe drinking water where the quality of tap/ ground water is not dependable. This type of purifiers does not claim removal of heavy metals and pesticides; however, when tested, the heavy metal reduction was found to be around 9.4 per cent to 93 per cent and pesticides reduction was between 30 per cent and 100 per cent. The removal of bacteria (such as E. Coli) was between 99 per cent and 100 per cent, and virus reduction was between 90 per cent and 100 per cent.
These purifiers may be recommended for rural and town areas where electricity and affordability is a major concern. The cost of product ranges from Rs 1,300 to Rs 2,500 and the low operating cost makes a huge difference in comparison to other purifiers (R/O and UV systems). The R/O system is recommended where total dissolved solid (TDS) is higher and the UV system where TDS is on the lower side.
Non-electric storage water purifiers require regular maintenance and cleaning of filters, and change of cartridge within 15 days/30 days; so care is required for these to work efficiently (must read user manual). Lastly, only go for those purifiers that mention their ‘manufactured/marketed by’ details on the packaging so that you can get service on your doorstep and on time.