What is a Water Purifier? How does it work?

Last updated on July 29th, 2026 at 08:22 pm

Find the Right Water Purifier for Your Home

What is a Water Purifier? How does it work?

Ontarian people have been facing the problem of impure water for a long time, and this problem is increasing day by day. Even the municipal water that is considered cleaner water may still have a lot of contaminants in it that need to be removed.

 

Most of the available water in Canada contains heavy metals, water-hardening minerals, sediments, bacteria, PFAS, and microplastics. OAKS Wellness Water has researched the water problems and provides you with tailored water purifiers to provide you with better quality, healthier water.

  

What Is a Water Purifier? 

A water purifier is a system that works specifically to provide its consumers with cleaner, healthier, and hotel-quality water.

 

A water purifier system uses various modern technologies, such as RO, UV purification, and sediment filtration, to remove contaminants from water. It cuts down the need for bottled water, reduces the operational costs, and provides your family and employees with pure water at your convenience. 

 

Why Is Water Purification Important?

Contaminated water can harm your family and your employees’ health, and may even cause fatal diseases.

 

  • Chlorine and sediments may cause digestive issues, and long-term exposure may lead to skin irritation. 
  • Heavy metals may cause learning disabilities in children and high blood pressure in adults. 
  • Arsenic may cause skin cancer, liver cancer and kidney cancer.
  • PFAS may weaken your immune system, raise cholesterol levels, and cause liver damage.
  • Bacteria and viruses may cause diarrhea, cholera, typhoid fever, dysentery, gastroenteritis, and hepatitis A.

 

Clean water is really important for your health and safety. If you are having a family with children and health-conscious people, it is very important for you to install an OAKS water purifier in your home.

 

Find your perfect system.

Your local Oaks experts will provide personalized recommendations for the right solution for your home.

 

How Does a Water Purifier Work?

Water purifiers use multiple filtration stages to remove different contaminants. Not every purifier system uses all stages; you need to add different filtration stages based on the available water source and contaminants present. 

 

Sediment Filtration

The sediment filtration stage is specifically designed to remove sand, dirt, rust, and debris from your water. It is necessary if the available water is well water. It prevents the accumulation of sand on the main filtration membranes.

 

Activated Carbon Filtration

Activated carbon filters are used in a system to remove chlorine, bad water odor, pesticides, and VOCs. It absorbs odor-causing contaminants to make the water taste and smell better. 

 

Reverse Osmosis Membrane

RO membrane is used to remove dissolved solids, heavy metals, microplastics and all of the contaminants from water, providing you with cleaner, healthier and hotel-quality water. It is best to use for getting cleaner drinking water.

 

UV Purification

UV purification is basically used for well water to kill bacteria, viruses and other microorganisms. It prevents any type of waterborne disease or infection in your family. 

 

Remineralization 

Most of the modern water purifier systems include remineralization stages to restore the beneficial minerals to the water after the purification process.

 

Types of Water Purifiers

There are different types of water purifiers based on their working and the contaminants they remove:

 

Reverse Osmosis (RO) Water Purifiers

RO water purifiers work on the principle of reverse osmosis. It is the best purifier to remove heavy metals, dissolved salts, and microplastics. It provides pure drinking water and is ideal to use for a health-conscious family. 

 

It provides you with better quality water, but in this system a lot of water may be wasted, and it needs regular maintenance such as filter membrane changes. 

 

UV Water Purifiers

UV water purifier systems use Ultraviolet radiation to kill germs like bacteria and viruses, making the water free of biological contamination. It doesn’t use any type of chemicals in the purification process. 

 

Activated Carbon Water Purifiers

Activated carbon purifiers are specially designed to remove the odor-causing metals and minerals like sulfur and chlorine from water to improve the water odor and taste. It provides you with cleaner water with low operational costs. 

 

Ultrafiltration (UF) Purifiers

UF purifier works on the principle of membrane-based filtration, using a thin membrane to remove all suspended particles from water. It works without electricity and without any chemicals. 

 

Whole-House Water Purification Systems

A whole-house water purification system is a point-of-entry water purifier that directly takes water from the main water line and purifies it to provide you with pure and cleaner water at every tap of your home. 

 

It is an ideal system for a large household where the water consumption is high, and you need pure water for every household chores. 

 

Find your perfect system.

Your local Oaks experts will provide personalized recommendations for the right solution for your home.

 

Water Purifier vs. Water Filter: What’s the Difference?

You need to know if you need a water purifier or water filter for your home, based on the contaminants present in the available water and the water safety level you need:

 

Feature

Water Filter

Water Purifier

Removes Sediment

âś“

âś“

Removes Chlorine

âś“

âś“

Removes Heavy Metals

Limited

âś“

Removes Bacteria

Limited

âś“

Removes Viruses

No

âś“

Water Safety Level

Moderate

High

 

If you are using municipal water, it is better to install a water filter. If you are using municipal water containing heavy metals, bacteria, viruses, sediment, and chlorine, and need a high water safety level, you should install a water purifier system for better performance. 

 

Top Benefits of Using a Water Purifier

A water purifier not only increases your bills and operational costs but also provides you with unlimited benefits that are really necessary for your family:

 

  • It reduces the chlorine levels and removes sulphur from water, improving taste and smell.
  • A water purifier works to remove contaminants to make the drinking water purer and healthier by reducing exposure to harmful heavy metals and bacteria. 
  • It saves on your operational costs for bottled water.
  • It is more environmentally friendly as it cuts down the plastic waste and carbon footprint by reducing the use of bottled water. 
  • It provides you with convenience for your family and workplace by providing a continuous supply of cleaner and healthier water.

 

Signs You Need a Water Purifier at Home

There are some common signs that may warn you that you need to install a water purifier system in your home:

 

  • Unpleasant taste or odor of water due to bacterial or mould growth in the water system
  • Cloudy water due to the presence of high levels of minerals and salts
  • Hard water issues like dry skin, frizzy hair, stiff laundry, and scale buildup on tiles and home appliances
  • Aging iron plumbing may cause rust to form in the water
  • If the available water is well water, you obviously need a water purifier. 

 

How to Choose the Right Water Purifier

A one-size-fits-all system does not fit all. You need to choose the right water purifier by taking into account some factors:

 

  • Always test your water using a DIY method or send it to a laboratory to check the type and levels of contamination in the available water. 
  • The contamination type changes with the water source. Understand the water source you need to purify: 
  • Municipal water may usually have problems with high levels of chlorine and rust due to the old infrastructure in Ontario.
  • Well water contains heavy metals, microplastics, bacteria, and viruses. 
  • Rainwater needs to be filtered before storing.
  • You need to consider household size; a house with a larger family may need a bigger capacity water purifier system. 
  • Always prefer certified filtration technology, such as the NSF-certified OAKS system, which may work better and ensure your peace of mind.
  • Always compare the operational and maintenance costs for the system to be installed.
  • Consider the maintenance and filter replacement requirements. 

 

Water Purifier Maintenance Tips

It is very important to maintain your system to ensure a continuous supply of cleaner, healthier water. The following are the maintenance tips you should follow:

 

  • Replace Filters on time, as old, contaminated filters may reduce your system’s efficiency.
  • Sanitize the system regularly to remove bacterial growth.
  • Monitor water pressure, as low water pressure may disturb your system’s operation.
  • If you are using a UV purifier, check the UV lamp performance regularly and change it on time.
  • Ensure to schedule annual professional maintenance for a better experience.

 

Conclusion

Cleaner and healthier water is really important for keeping you and your family healthier. Normal water may appear pure and clear on sight, but it may contain contaminants that can harm your health.

 

A water purifier is specifically designed to remove each type of contaminant from the available water. A one system can’t be ideal for all Ontario houses. You need to choose the system according to your needs, like the quality of your available water and your family size.

 

 Feel free to contact OAKS professionals for a free quote and a tailored NSF-certified system according to your needs.

 

Find your perfect system.

Your local Oaks experts will provide personalized recommendations for the right solution for your home.

FAQs

What is the main purpose of a water purifier?

The main purpose of a water purifier is to remove all types of contaminants like dirt, chemicals, bacteria, and viruses, making the water pure and healthier.

If the available water contains bacteria, viruses, and heavy metals, a water purifier is better than a water filter. 

Yes, a water purifier can remove bacteria and viruses effectively. 

Some of the water purifiers remove healthy minerals from water, but modern technologies remineralize the water after the purification process.

It is highly dependent on water quality and water usage. Usually, a multi-stage RO system or UV purifier is useful for home use. 

Written by Joseph Mroueh

Joseph, founder of Oaks, develops high-quality whole-home and drinking-water filtration systems. He focuses on delivering reliable, clean, and safe water solutions for modern households.

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