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What should we check before buying a RO? (Everything You Need To Know)

Water that is supplied to everyone’s home is coming from multiple sources like municipality, bore wells, or tankers. Water that is coming out of the tap may look crystal clear to you, but it is full of dangerous invisible microbes and organisms including viruses, bacteria, and cysts. It also contains dissolved toxic impurities like lead, fluoride, and arsenic. The water also consists of beneficial salts and minerals like iron, magnesium, calcium, and many more. To remove all the above-mentioned impurities, RO water purifiers are slowly becoming famous. It is made of superior technology where purification of the water is the first priority.

RO or reverse osmosis operates as the water is forced to pass through a semipermeable membrane leaving all the contaminants behind that are removed through the drain. The clean water for drinking purposes is then collected in a holding tank.


Reverse Osmosis Water Purifiers

RO Reverse Osmosis Water Purifier

The RO (Reverse Osmosis) water purifiers do not implement any type of light or compound to purify the water. The machine is made up of a fine membrane of a few microns to purify the water by passing it through the membrane. This type of water cleaning device also eliminates the dissolved salts present in the water.

The RO membrane includes the capabilities to remove the impurities like must and dust from the water. If you live in the locality where the TDS level in the water is high, then this is the ideal one for you.


What is the concept of RO Water Purifiers?

RO water purifier operates on the cross filtration concept. Cross filtration offers two outlets; one is for the water to flow and the other one that eliminates the contaminated or the rejected water. This rejected water contains almost 93 to 96% of the toxic impurities. An efficient RO system eliminates almost 99% of the TDS or Total Dissolved Salts, ions, molecules, impurities like pyrogens, bacteria, and viruses.

The contaminants with a molecular weight of more than 200 do not pass through the RO filters. Sodium ions pass through the RO water purifiers that necessitate the implementation of the supplemental filters to remove such ions. RO filters also eliminate heavy metals from the water. You may find the water treated by RO water purifiers slightly acidic as they have a pH value below 7. They are very efficient in treating the ground waters having a high TDS concentration.


Different Types of RO water Purifiers

There are primarily two different types of RO water purifiers. They are:

1. Under sink RO Water Purifiers

These types of water cleaning machines are fitted under the kitchen sink. The water outlet tap is fixed with the tap of the kitchen and can be easily operated. The purifier is fitted with the pressurized air containers for water storage that have a minimum of 5 liters of capacity. Moreover, they do not occupy considerable space which makes it very convenient to use.


2. Wall Mounted RO water Purifiers 

Wall-mounted ones have a minimum of 5 to 10 liters of storage capacity and are most widely used in every household. The only disadvantage of this model of purifier is that there is water wastage.


Benefits of the RO water Purifiers

The advantages of the RO filtered water purifiers are described as follows.

  • Eliminates heavy metals like lead, dissolved salts, and arsenic from the water
  • Ro with a TDS mineralizer or controller retains all the natural minerals in the water
  • Easy and compact to operate and maintain
  • It not only kills the virus and bacteria but also gets rid of their dead bodies from the drinking water


Buying Guide of the RO water Purifiers

Before the installation of a water purifier with RO filters, it is vital to check if you really require one. Let us check below, some of the key factors to consider before purchasing a RO water cleaning machine.

Pressure of water

You should always check the pressure of the water coming out of the tap. Generally, the RO purifiers need a pressure of 5 to 40 Pounds per square inch to operate effectively.


Electricity is another important element that should be kept in mind before making a final decision. If your area has frequent power cuts, then this machine will not be ideal for you as it required electricity to run.

Wastage of Water

RO wastes a lot of water during the purification process. More than 60% of water is wasted leaving only less than 40% fit for consumption.

TDS levels and Water Source

RO water purifiers are perfect for those areas which have a water supply of higher TDS levels of over more than 500 PPM. The TDS of the water can be measured through the TDS meter. If this kind of water purifier is used in the areas with low TDS level water supply, then the water will be stripped of the important salts and minerals.

Consumable and the Maintenance Cost

RO water purifiers are composed of membranes, pumps, and cartridges. All these parts will wear and tear with time and need to be replaced. The AMC or annual maintenance contract for the RO water cleaning equipment is higher compared to the other models of water purifiers.

Mineral and Salt Removal

Most of the RO membranes in the water purifiers almost reduce the TDS by 90%. Suppose if the TDS of the input water is 600 PPM, then the resultant TDS of the water after the complete purification process will be 60 PPM.



Thus, to sum up, it can be restated that water with high hardness and TDS that have an unpleasant taste is best for the RO purification process. Now that we know everything about a RO water purifier, all you have to do is select the correct one for your family.

However, if you have any further questions or queries regarding this topic, then feel free to comment in the below section. Stay tuned to our website for more details!

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