Tag Archives: ro filters

Top contaminants filtered out by reverse osmosis systems

Reverse osmosis systems are one of the best filter systems on the market.  Their merit lies in the fact that they can produce high purity water by removing a wide range of contaminants. Nonetheless, they are easy to maintain and are affordable. Thanks to reverse osmosis systems, obtaining high quality drinking water is not impossible.

Reverse Osmosis System with reminaliser

Tap water can contain many types of naturally occurring and added contaminants, however, this complex water filtration system can reduce or remove a significant proportion of these contaminants. For a better understanding of the capabilities of an ro filter, here are the top 5 contaminants reduced by reverse osmosis systems:

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How to maintain your reverse osmosis system?

Most water filters for residential use are created with low-maintenance in mind. Good reverse osmosis filters are no exception, and they are a good investment both maintenance wise and for obtaining high purity water. In this article we’ll go into the details of how to maintain your reverse osmosis system to have your RO filter working at its full potential.

maintain your reverse osmosis system 

There are three main aspects that you have to consider in the maintenance process of your RO filter: replacement of pre and post-filters, replacement of RO membrane, and the sanitising your water tank. The challenge with replacing all these elements is that you have to do them at different intervals, however, given that all you have to do is to remember to replace the filters at the required frequency is considered an advantage by some people.

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How many filtration stages should a reverse osmosis system have?

Because no filter media can efficiently tackle all types of contaminants on their own, most water filter systems are constructed in a way to combine several stages of filtration to achieve the desired filtration efficiency and water purity. In some cases, having a certain number of filtration stages is compulsory (e.g. UV water filters need a pre-filter), in other cases, some stages are optional (e.g. remineraliser filters in RO water filters).

4 stage reverse osmosis system 

Reverse osmosis water filters are a typical example of a multi-stage water filter. These systems can have up to six or even seven stages of filtration, but are all these stages compulsory? How many filtration stages should an RO system have?

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How much does a reverse osmosis system cost?

Apart from the brand, the contaminant removal capabilities, the filtration stages, ease of maintenance, the cost of a reverse osmosis filter is also an aspect that shapes the purchasing decision-making process of consumers. With the advancements in water filtration technologies, more versatile systems emerge, however, this doesn’t necessarily translate into higher costs. In fact, the cost of a decent reverse osmosis system is comparable to the cost of an under-sink water filter.

watts-4-stage-reverse-osmosis-water-filter-system-ro

In any case, you should expect prices to range between £200 and £4000+. Reverse osmosis filters designed for domestic use are on the lower end of the price range, while RO filters designed for commercial use are pricier.

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How many stages of filtration do you actually need?

If you’re in the market for a water filter you’re probably wondering about a few things concerning the water filtration unit that you should purchase and the quality of filtered water they can produce. Do you need more than one filtration stage to obtain high purity water? If so, how many stages of filtration are required? Are single stage filtration units powerful enough to efficiently remove contaminants?

water filter stages

Water filtration is usually a multiple stage process and chances are your standard under-sink water filter is also a multi-stage unit, that is, it uses more than one type of filter media (e.g. sediment filter and carbon block filter) or different versions of the same type of filter media (e.g. granular activated carbon and carbon block filter) to remove contaminants from your tap water. Even single stage filters may contain a combination of two or more types of filtration media (e.g. ceramic filter cartridge with carbon block insert).

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