Types of drinking water filters

health benifit of drinking water 5 Apr 2022

Consuming tap water isn’t safe as it contains millions of unwanted harmful particles, that can be hazardous to our health. That’s why it is better to consume filtered water, which eliminates all the unwanted particles from the water and makes it safe for drinking.

Today we have multiple water filter systems available in the market which differ in their technology.

If you want to find out more about water filters online then this blog is for you. Below we will discuss various types of drinking water filters.

Mechanical water filter

The mechanical water filter cleans the water by surface and deep filtration mechanism. The filter medium appears as a woven mesh screen or mat of fibers in which the larger particles are removed by surface filtration whereas the smaller particles are removed through deep filtration. This system removes dirt, sediments, or other harmful particles present in the water.

The size of particles is measured in microns and the filters are rated according to the size of particles they can remove particles.

Filter maintenance

Filter maintenance is important as they are likely to clog over time due to excessive trapping of particles. If a filter gets clogged beyond its particle holding capacity, then channeling might occur causing the trapped debris to dump into the effluent.

So, when a filter becomes clogged, it can no longer filter the water and you must replace it with a new one before channeling occurs.

Reverse osmosis systems

Reverse osmosis is a process where the water is deionised under pressure by passing it through a semi-permeable membrane. The high pressure forces the water out of the semipermeable RO membrane, leaving behind almost 99% of dissolved salts, colloids, organics, bacteria, and pyrogens. It removes any practical having molecular weight greater than 200 (MW of water is 18), or particles with greater ionic charge. This is an effective technique used for producing purified water suitable for many industries i.e., pharmaceutical, metal finishing, food, beverage, etc.

RO maintenance

Frequent cleaning and pre-treatment are required to prevent RO membrane failure and costly repairs. If it is maintained properly it will continue to provide you with purified water for many years.

Ion exchange

Ion exchange is a water treatment process that is done to remove unwanted or contaminated ions such as nitrates, sulfates, arsenic, boron, and fluoride. It is a highly selective method of removing specific contaminants in which the exchange occurs between a solid (resin) and liquid (water).

Today this technology is greatly used for softening or deionising the water from specific pollutants. So, if you want to remove specific low concentration pollutants from your water, then this water filter will work for you.


Just like any other filter, the efficacy of ion exchange is also affected over time due to mineral scaling or clogging. To avoid such issues, you can undergo pre-treatment processes such as filtration or the addition of chemicals.

Activated carbon

Activated carbons are a group of adsorbents that can adsorb various organic and organic materials. In this method, the molecules of adsorbate are attracted to the surface of the adsorbent till the equilibrium is reached. This type of filter is specifically used to remove objectionable tastes or odors from water. Remember that with the passage of time, the ability of activated carbon to remove contaminants is affected and it needs to be changed.

Ultraviolet filters

UV filters purify the water by exposing bacteria, and other germs to UV radiation so they can’t reproduce. These radiations scramble the DNA of living organisms and prevent them from spreading disease. It kills almost 99.99% of germs in the water. Unlike other water filters, It doesn’t purify water by removing particles instead disinfects the water.

If you have any doubt that your water contains harmful bacteria or other living organisms, then a UV water filter system is the best option for you. This filter system sterilises water efficiently, disinfects without chemicals, adds no tastes, and is easy to maintain. Keep in mind that UV filters do not remove any chemicals, ions, or odours from water.


The sequestration technique is used to isolate a substance chemically. Polyphosphate is a commonly Used sequestration media that sequester calcium and magnesium that cause corrosion. Sequestration media is only used in a limited amount as it only inhibits scale formation rather than removing it.

This type of filter system is most suitable for domestic use instead of commercial applications.

Under-sink filters

Under the sink, water filter systems work on a simple principle and are installed underneath your sink to purify the water for cooking, and drinking. These filters are commonly used in households due to the following benefits:

  • Improve water taste
  • General chemical and heavy metal reduction
  • Bacteria and cyst reduction
  • Mineral reduction
  • Make water safe to drink
  • Don’t require additional space
  • Easy to install and maintain
  • Cost-effective

Squeeze/gravity filter

The gravity filter, as the name indicates, purifies the water with the help of gravity. It has two chambers; one is the upper chamber where you put the contaminated water while the other is the lower chamber from where you get filtered water. This filter is highly convenient, functional and doesn’t require any plumbing or electricity to function. It comes in various sizes so you can choose depending on your requirements.


Deionisation is defined as the method for removing dissolved salts from the water bypassing the water through two in exchange materials. The water produced as a result of deionisation is highly pure and does not build up the scale. Some experts say that ionised water is best for detoxifying the body.

Deionization filters can be used in homes, offices, and schools where the water is unsafe for drinking. It is also used in industrial settings to cool and lubricate machines.

Countertop filters

Countertop filters are an affordable and easier solution to improve the quality of tap water. These filters they up minimum space and are installed exactly where you need to access clean water. You just have to attach this filter directly to your faucet to get purified water. Different filtration media are used in countertop filters to make the water free of contaminants. Countertop filters are of the following types:

Carbon filters – removes odour and improve the taste

Ceramic filters – remove microorganisms such as bacteria, pathogens, etc.

Ultrafiltration – removes undissolved solids from water

Water distillers – produce mineral-free water

Before you choose a countertop water filter for your home you must understand the contaminants present in your water so you can get tailored results.

Faucet filters

Faucet filters improve the quality of water by purifying the tap water as it flows. These easy-to-use filters come in various types, materials, flow rates, and styles so it’s better to make your decision based on your requirements. They will make your water free of various harmful contaminants, agricultural and industrial chemicals. Faucet filters are very easy to install and come in different sizes to fit the faucet.

Microbiological systems

Microbiological water systems help in removing microorganisms such as bacteria, pathogens, and algae from water which would otherwise cause various diseases. It uses filtration technology such as coagulation, filtration, and sedimentation to remove microbes, odour, and other minerals from water.


Each water filter system is designed uniquely to purify the water and the selection of filter is based on the contaminants found in your water. Amglow offers the top-quality water purifier online at affordable rates. Contact us now to find out how which water purifier will work best for you.

Enquire Now

Quick Enquiry