How Does Water Purification System Work

- Aug 19, 2019-

Water purifiers have become a necessity for every household. Water purifiers ensure that you get clean and safe drinking water on demand so that you stay away from water-borne diseases. There are different types of water filtration processes such as Reverse Osmosis Water Filtration (RO), Ultra Filtration (UF) and Ultra Violet disinfection (UV). You need to choose a water purification system depending on the quality of the water. Though we can easily get in touch with service professionals if there is a problem, it is always helpful to know how these systems function.

Reverse Osmosis

Reverse Osmosis system involves a simple water filtration mechanism. The filtration system includes passage of water or other solvents through a semi-permeable membrane. The membrane blocks the dissolved solutes that contaminate water. The process filters out all sorts of contaminants such as ions, pesticides, micro-organisms and other chemicals from water. This filtration process is one of the most effective methods of water purification. Desalination is the process of removal of salt from seawater Many water treatment plants now started using this Reverse Osmosis technique to deal with many water-related issues.

There are various components involved in a Reverse Osmosis system. The functions of the components that play an integral part in the RO system are as follows:


Water flowing through cold water line valve passes through the Reverse Osmosis Pre-Filters. Some of the commonly used pre-filters are sediment and carbon filters. These filters remove dirt, chlorine content and other sediments present in water to protect the membranes from damage.

Reverse Osmosis Membrane

RO Membrane is an important component of the system. The membrane serves the purpose of removing all sorts of contaminants in water. Water enters into the storage tank after this purification stage.

Storage tank

As the name suggests, this tank purified treated water. The storage capacity of the purifiers differs, which is the reason why you need to check the usage before making the final decision.


Before water stored in the storage tank runs out of the Reverse Osmosis faucet, it enters through the final post-filters. It is actually a carbon filter. Carbon filters remove bad odors from the water that you drink and also improves the taste of water.

Drain line

The drain line is used to drain out the wastewater which consists of dirt and other contaminants. 

Ultra Violet disinfection

Ultra Violet disinfection usually involves a UV lamp. UV lamp provides pure and safe drinking water. The UV light used in this process is a high powered UV which is also known as UV-C or germicidal UV. UV-C rays penetrate into the body of pathogens to deactivate them. The UV rays modify the DNA of the pathogens in such a way that they cannot multiply. These rays have the ability to kill 99.9% of the microorganisms.

Unlike chemical disinfection, the harmful microorganisms are unable to develop any immune mechanism against UV light (Source: Water-Tiger). The pre-treatment process maximizes the efficiency of the treatment. Water passes through the sediment filters, carbon filters during the pre-treatment phase. Sediment filters remove silt whereas carbon filters remove the organic impurities present in water.

Ultra Filtration

Ultra-Filtration process uses hydrostatic pressure to force water against a semi-permeable membrane. This semi-permeable membrane has the ability to remove bacteria and different types of microorganisms and bad odor in the water.

Ultra-Filtration is not very different from reverse osmosis, microfiltration or Nano Filtration, except in terms of the size of the molecules it retains. Ultrafiltration system removes colloids, bacteria, pathogens and other molecules that are larger than the size of the pores in the semi-permeable membrane.

Wrapping Up

Water purifiers from renowned brands use a combination of purification methods to remove different types of contaminants and make water suitable for consumption. However, make sure that you use a water purifier from a renowned brand such as KENT that not only removes impurities but provides exceptional after-sales services. To check out the range of water purifiers, click here.