RO Water Purifiers: The History and Pros and Cons

RO Water Purifiers: The History and Pros and Cons

No matter which part of the world you are in, water purifiers have become a must, thanks to the deteriorating water quality. The Reverse Osmosis water purifiers come in handy when tap water systems can’t be relied upon. This special kind of water filtration system is installed as a personal water filter in kitchens. It can be installed under the refrigerator, sink, and counter-top.

This filter prevents larger molecules from passing through, like salts and other contaminants. Thus, it is a popular filtration method owing to its efficiency to produce clean drinking water. Normally, its system includes a couple of components, such as a cold water line valve and pre-filters – sediment or carbon filters. There are also RO membranes, and post-filters that usually contain carbon filters, and automatic shut off valves or SOV.

Its additional components include a check valve, flow restrictor, storage tank, faucet if it’s installed under the sink filters, and a drain line. Even though these components are usually the same, the quality of each part and the entire system may vary per brand. If you are looking for a good water purifier in the Indian market, here is a great buying guide. Read on to know the pros and cons of this water filtration method.

Brief Background of Reverse Osmosis

Believe it or not, the first recorded information about osmosis dates back to 1748. Jean Antoine Nollet discovered that nature has its way of Reverse Osmosis filtration which started million years ago. This means that nature has been using this process already even before technology made its way into our lives. Nollet decided to replicate the process using a pig’s bladder as the membrane. He demonstrated how solvent molecules from low solute water can flow through its walls.

From there on, the water is then pushed through a higher solute concentration that is made of alcohol. His replica proved that a solvent can be filtered through a semipermeable membrane through the natural process of osmotic pressure. Lastly, this solvent will cross a cell membrane until it reaches its equilibrium on both sides of the wall. However, it was only in the 1940s when researches from America began considering the topic of desalinating seawater.

To help solve the water shortage, two researchers at Sidney Loeb, UCLA, and Srinivasa Sourirajan continued the work in 1959. Of course, they succeeded in producing a synthetic RO membrane made of cellulose acetate polymer. Since then, more research and development were done to come up with the modern RO water purifier system. Thus, manufacturers from different parts of the world continue to innovate and incorporate it into the latest technology for the best results.

Over the years, household water filters have evolved together with the latest technology to offer more benefits.

Pros of Using a Reverse Osmosis Water Purifier

·         Removes 95 to 99% of TDS

This method can block the dissolved solids as well as fluoride, chlorine, and more water contaminants compared with other water filters. Thus, it can help produce water with higher quality that is also free from harmful bacteria.

·         Enhances the Taste, Look and Odor of Water

Since it gets rid of contaminants, this water filtration system can enhance the taste of the water. Even chloride and fluoride that are commonly added in tap water can leave a bad odor and taste. Thus, using an RO water purifier can give you clear water that is more pleasant to drink. When it comes to cooking, it can also help improve the taste of your food.

·         Promotes Rehydration

Stay hydrated. Thus, a good water filtration system like this can encourage individuals to drink more water that is healthier. This can also help reduce the use of bottled waters once installed for the entire household or just under one sink.

·         Energy-Efficient and User-friendly

This method doesn’t require an electric power source to work so you can save energy. Most importantly, it is easy to operate since it is fully automated once installed on the countertop or under the sink. You don’t even have to worry about maximizing its use since it is easy to maintain.

Just ensure that what you got is made of high-quality components. Most RO filters require replacement every 6-12 months while semi-permeable membranes require cleaning every 2-3 years. Also, the entire RO system requires sterilization once a year.

Cons of Using Reverse Osmosis Water Purifier

·         Removes Important Minerals

Although its main purpose is to remove unwanted water impurities, it can also remove other important minerals. These minerals include 92-99% calcium, magnesium which is vital in every individual’s everyday diet.

·         The Process Takes Some Time

The RO water purifier system takes more time to get the job done since it relies on water pressure. This filtration method slows down the flow of water so RO filtration systems include water tanks to store enough water. If you need any amount of water that exceeds your tank’s capacity, you have to wait until it is refilled.

·         Has Clogging Issues

This is one of the most common issues that RO water purifier users face despite having sediment or carbon pre-filters. Thus, following the system’s proper maintenance schedule according to the manual is a must.


Reverse Osmosis water purifiers may not require frequent maintenance but its filter cartridge still needs to be replaced on time. To make sure that it lasts longer; don’t invest in a sub-par water filtration system. 

Abigail Kent
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