How Does Reverse Osmosis System Work?

Have you ever tasted the water that belongs to someone who has a reverse osmosis system at home?

If so, it is apparent that you are already aware of the pleasant taste of this water.

This water will not only taste good, but it ensures that your entire family remains safe and healthy as they drink water that contains no contaminants at all.

The reverse osmosis drinking water is undoubtedly the best for each and every home. Nevertheless, it is crucial to understand how this process works.

Osmosis is the process in which the molecules are capable of passing through the semipermeable membranes from a liquid that is less concentrated to a solution that is more concentrated.

Reverse osmosis is nothing but the reversal of this process.

How Does It Work?

Reverse osmosis is an innovative technology used for removing a majority of the harmful contaminants from the drinking water by pushing it under a lot of pressure through the semipermeable membrane.

It is also known as the RO system, in which you can deionize or demineralize water and make it tasty.

There is a lot more to this process when you are using the reverse osmosis system for purifying the drinking water. Listed below are the following steps that clearly describe how the reverse osmosis system works. If you are interested in RV water filter that has RO system, read this article.

01. Pre-filtration

The first and most important step that is involved is the pre-filtration. This step is basically meant to provide protection to the membrane.

It helps in removing the larger sediments, the dissolved solids, and plays an important role in reducing chlorine.

The very first cartridge is known as the carbon block or the sediment filter. Because the membrane tends to get damaged due to the excess sediment or too much of chlorine that is present in the municipal water.

02. The Reverse Osmosis Membrane

The water is normally forced through semi-permeable membranes under immense pressure.

This membrane is nothing but a plastic material, which allows the water molecules to pass easily.

However, chlorine, calcium, and sodium along with the large molecules of urea, glucose, viruses, and bacteria cannot pass through this membrane.

Reverse osmosis drinking water systems have been tested and certified in order to reduce;

  • Lead
  • Copper
  • Arsenic
  • Nitrites and Nitrates
  • Selenium
  • Chromium
  • Radium
  • Fluoride
  • Cadmium
  • Barium
  • Total Dissolved Solids
  • Cryptosporidium

03. Post Filtration

Before the water becomes ready to drink, it also goes through the second carbon filter or the post filter, which can remove the remaining contaminants, as there are chances that they can slip through the membrane.

Once all the impurities are removed, the water is filled up in the storage tank and waits there until you are ready to use it.

04. The Final Polish

After this, the in-line activated filter helps in giving the water a final and last polish when the water begins coming out of the faucet.

This helps in removing the flavors and odors which may come from your holding tank or perhaps all the system hoses.

The polish ensures that your water tastes fresh and healthy.

What Does Reverse Osmosis Remove?

Reverse osmosis plays an important role in removing salt, iron, manganese, fluoride, lead as well as calcium.

Most of the mineral components of water are larger in comparison to the water molecules.

Therefore, they can be trapped by the semipermeable membranes and can easily be removed from the drinking water when they are filtered through the reverse osmosis.

This unique method helps in removing the sodium as well as the dissolved solids, which makes the water soft and appropriate for usage.

Removal of Minerals

Reverse osmosis is responsible for removing around 99% of the harmful contaminants which include the minerals from the supply of drinking water.

The advanced filtration system helps in removing minerals because the molecules are larger than that of water.

Though minerals are necessary for the body, the tap water also contains the inorganic minerals, which cannot be consumed by the human body easily.

Inorganic minerals can cause a number of degenerative diseases like hardening the arteries, kidney stones, arthritis, glaucoma, gallstones, hearing loss, diabetes, obesity, cataracts, and emphysema.

The minerals present in the hard tap water can be rejected by the cellular tissues.

Reverse osmosis helps in removing these minerals as their presence may lead to the obstruction of the arteries as well as internal damage.

Straining of Impurities

For years, reverse osmosis water filtration has been extremely efficient in removing the unwanted impurities from the water in a cost-effective as well as efficient manner.

Reverse osmosis is capable of removing a number of other impurities other than the inorganic minerals. These impurities include;

  • The Water Microns
  • The Aqueous Salts
  • The Poliovirus
  • The Carbon Block
  • The Smallest Possible Bacteria
  • Tobacco Smoke
  • The Smallest Yeast
  • Human Hair

This is why the reverse osmosis system is becoming more popular with the progress of time.

Why is Reverse Osmosis Better?

Soft water is great for cleaning, laundry, and showering. However, depending on the hardness of your water, there are chances that it can have the total dissolved solids, which are responsible for affecting the taste of water.

This is because the hard minerals are normally replaced by sodium. There can also be a number of other contaminants in the water that a water softener is not capable of removing.

As soon as you install the reverse osmosis system, you will start enjoying water that tastes better along with a perfect tea or coffee.

You will get healthy water easily from the kitchen sink. The reverse osmosis system helps in removing all the contaminants, which makes it one of the best for most of the homes.


Reverse osmosis systems are commonly installed under the kitchen sinks or the basements.

You not only get access to healthy water, but you can also wash your cars or use this water for a number of purposes in order to get the spot free finishes.

Installing a reverse osmosis water system ensures that you are safe and free from all the harmful contaminants that can lead to deadly diseases.

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