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Things to Look for When Buying RO Water Filter

Purchasing a Reverse Osmosis (RO) water filter can be made easier if you have the necessary knowledge about the reverse osmosis water filtration technique. Before you purchase a new RO water filter you must consider these points:

Bench-top or Under-sink

The very first thing you need to decide is whether you require an under-sink mounted RO filtration system or a portable bench-top water filter system.

In many cases, an under-sink filtration system is a great choice and this plumbed-in setup involves a holding tank that makes sure that you have a reservoir of a good and healthy water supply close to your tap.

A countertop or bench-top RO system is ideal for people living in rented houses and can’t install the system. This setup will require you to fill the water container after every few hours.


Firstly, don’t opt for the RO system only based on price as it can lead you to either purchasing an expensive water filter that is not any good than a model half of its price.

On the other hand, be wary of very low-cost models. Keep in mind that RO water filter is an investment that you make in your health.

Carbon filter

The carbon filter is crucial since the RO membrane won’t get rid of chlorine, chloramines, and volatile organic compounds.

Most importantly, you need to ensure that the carbon containers coming with your reverse osmosis water filter system deals with this.

NSF 58 certified

Water filtration systems used in homes that claim fluoride reductions should fulfill the National Sanitation Foundation (NSF) Standard 58 criteria of eliminating fluoride.

This standard entails that a water filter unit must get 1.5 milligrams mg/L concentration in the resultant pure water if the initial concentration was 8.0 mg/L, or must be able to remove almost 80% of fluoride.

However, if the initial concentration of fluoride is lower in the water, this removal percentage may not be consistent.

Waste Water produced from RO water filter

Reverse osmosis water filter systems function by removing the contaminants and impurities from water by flushing to drain. Reverse osmosis water waste is an issue that needs to be adressed.

Some cheap RO water filter systems may result in flushing of lots of water like 10 to 15 liters to drain for every liter of pure water generated. A best quality reverse osmosis water filter works at a ratio of 1:1.

Holding Tank

The water is kept in a holding tank in a reverse osmosis system. It is important to consider the tank’s quality that keeps the pure drinking water.

Still, you need to ensure that it is certified and NSF approved and must have a butyl bladder which guarantees that it is safe to hold the pure water.

Water Filter Tap and tubing

We have used the best quality components and cartridges to get the pure water, all the parts where the clean water will get in contact should be NSF approved.

There is no point to purify the water if you use lead tap or plastic tubing that can contaminate the water. So, chose the tubing and tap for water filter wisely so that it doesn’t contaminate the pure water and you have clean drinking water.

Ease of Service

Latest reverse osmosis systems come with containers that are easy and quick to change, making the system service much simpler just as exchanging a light bulb.

Look for modern and up to date RO systems that are easy to service and use.

Keeping in mind the things discussed in this article before buying the reverse osmosis water filter system for your home so that you made the right decision.

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