Water Filters Vs. Water Purifiers: What Is The Basic Difference?

Water is a basic necessity, and safe drinking water should be available in every household. The quality of tap water we receive can vary a lot depending on the source and location. So, for clean potable water, it is important to use some form of filtration or purification system. Until recently, there were no major differences between these two systems, but they have become more specialized. The water filter and water purifier work the same, but there is a slight difference between them.

If you’re trying to decide between a filter and a purifier, it’s important to understand their subtle differences. This article will discuss what sets them apart and provide information about which product may better suit your needs.

What is Water Filter?

A water filter is a device that filters out impurities from water by trapping them in a porous material. The most common type of water filter is a carbon-based filter, which uses activated carbon to trap contaminants in the water. This filter can remove sediment, chlorine, lead, and other contaminants from the tap or well water. Other types of water filters include reverse osmosis systems, which use a membrane to filter out contaminants, and ultraviolet filters, which use UV light to kill bacteria.

What is Water Purifier?

A water purifier is a device that removes impurities from drinking water. It works by using two different purification methods: reverse osmosis and distillation. Reverse osmosis works by forcing all water particles through a very small semi-permeable membrane, which screens out any particles that are too big to follow the pathway of the water. Distillation involves boiling the water and capturing the steam, which separates any contaminants or minerals in the process.

Water purifiers are important for ensuring safe drinking water, as they can remove biological contaminants and minerals from the water supply. This makes them more effective than traditional filters, which only remove physical impurities such as dirt and sediment. Water purifiers also help reduce health risks associated with consuming contaminated drinking water, making them an invaluable resource for households and businesses.

The Difference Between Water Filters and Water Purifiers

Water filtration and purification are two different processes that can be used to ensure the safety of your drinking water. Water filters remove contaminants from the water, such as chlorine, lead, and other chemicals. This process does not remove all contaminants, however, so it is important to use a filter that is certified by NSF International or another reputable organization.

On the other hand, water purification systems use reverse osmosis technology to remove all contaminants from the water. This process also removes beneficial minerals from the water, so finding a system that includes a remineralize to replace these minerals is important.

Aquasana offers a variety of filtration and purification systems for both home and commercial use. Their multi-process filtration systems remove negative contaminants while leaving in healthy minerals your body needs.

For those looking for a more comprehensive solution, their reverse osmosis system uses NSF-certified Claryum® filtration technology along with a remineralized so you can drink with peace of mind. Aquasana also offers whole house, shower, countertop and under-sink filters that reduce bad elements while leaving in beneficial minerals.

How to Decide Which One to Use?

Water purifiers are designed to remove all contaminants from drinking water, including viruses and bacteria. This is done through reverse osmosis, which uses a semi-permeable membrane to filter out impurities.

Reverse osmosis systems can also reduce the number of dissolved solids in water, such as salt and minerals. Water purifiers are often used in areas where the water supply is not safe to drink, such as developing countries or areas with poor water quality.

When deciding between a water filter and a water purifier, it is important to consider the quality of your water supply. If you have access to clean tap or well water, then a filter may be sufficient for your needs.

However, if you live in an area with poor water quality or are concerned about viruses and bacteria, then a purifier may be the better option. Additionally, it is important to choose a system certified by NSF International or another reputable organization to ensure the highest quality of filtration.

Frequently Asked Questions [FAQs]

1. Do water filters actually purify water?

No. Water filters, water treatment systems are not 100% effective in removing all contaminants from water. This is because water treatment systems only remove certain contaminants and do not remove them all. Also, water treatment systems have a limited lifespan and must be replaced after a certain time.

2. What do water filters not remove?

Water filters are commonly used to remove contaminants and impurities from water. However, there are some contaminants that water filters don’t remove. For example, chlorine removes a musty odor and kills microorganisms and bacteria. Unfortunately, water filters also do not remove bacteria, harming people.

3. What type of water purifier is best?

Reverse osmosis water purifiers are best to purify the water. To make the water safe for consumption and to remove contaminants, the RO system uses a semi-permeable membrane to filter the water from various pollutants like viruses, chemicals, heavy metals, hormones, etc., to purify the water. Due to the high pressure and special membrane, the reverse osmosis system eliminates all the pollutants from the water.

4. Are drinking water filters worth it?

Yes. There are many ways in which a water filter can provide you with health benefits. A filter works like your immune system. It purifies the harmful toxins and bacteria from your water before you drink it. This results in many benefits, like killing the germs that cause diseases.

Is boiled water the same as filtered water?

It is not true that boiled water is the same as filtered water. Boiled water is boiled water. You forgot to add one important factor left behind in the boiling process, i.e., impurities. While with a water filter, you not only boil the water but also make it free from harmful germs. According to scientists, boiled water does not provide the full benefit of water as filtered water does.


There is a difference between filters and purifiers, for sure. Filters can treat all kinds of water, while purifiers are more selective in removing contaminants. If you want to use only one option, use a purifier instead of a filter. But if your budget allows you both options, it’s better to opt for purifiers as they work faster than filters with larger capacity and can also be used regularly. Regarding health issues such as allergies or diarrhoea, it’s also essential to keep an eye on the quality of the purified water you use at home.


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