Top 5 Best Reverse Osmosis Systems – Buying tips and guides

If you are planning to find the best reverse osmosis system, you may feel frustrated and don’t know how to start, because there are plenty of different models from different manufacturers. Therefore, looking for the best RO system without a guide could be difficult to you.

Why Do You Need a RO System?

There are many various filtration methods used to purify water. However, Reverse Osmosis is one of the most effective, natural and cost-effective methods to purify water, providing you with clean, safe and healthy drinking water. You can get healthy water without paying much. For example, some people may like drinking bottled water. Compared with buying bottled water, having a RO system to get pure water has a lower cost.

What’s more, even bottled water may be not completely pure and there are many contaminants we may not know. Therefore, a RO system can provide you clean, safe and healthy water for drinking and cooking.

These systems have a semi-membrane which only allows pure water to pass through and contaminants (like heavy metal, chemicals, salts, pesticides etc.) are removed. The filtered water is stored in a tank and filtered water will flow out from your faucet once you open it.

In the beginning, RO systems were invented to purify and desalinate sea water. They are designed for commercial use. For example, large companies like Coca Cola and Pepsi use this kind of systems to purify water for their beverages and their employees. However, we also can buy household RO systems to purify our tap water or well water and then we can enjoy filtered water without any bad smell and taste.

We have done some research and top 5 best reverse osmosis systems were selected due to their performance, prices, ratings and customer reviews. Once you have one, you may feel grateful, because it is a must-have product in your house. It is really a great investment in your health.

Best Reverse Osmosis System

In the following, top 5 best reverse osmosis systems were chosen to help you quickly find what you really want. You can choose one of them according to your preference and they are all top rated on the market. There are also plenty of customer reviews you can check.



This 5-stage system is one of the best-selling, popular and highest recommended models on the market. There are many customer reviews for you to check and most of them are positive reviews. Therefore, the average rating is also very high. Many people think it is the best one and can provide clean water for their family.

This system can remove up to 99% of different contaminants, such as rust, dirt, slit, chemicals, heavy metals, virus and bacteria, etc. Once you have it, you don’t need to buy bottled water again and this helps you prevent up to 16,000 plastic bottles from polluting our environment. It can provide tasty water as bottle-water does. Although it may be costly in the beginning, it can save you a lot of money in the long run.

The manufacturer is also trusty manufacturer. This model is certified with ISO 9001:2000, ISO 14001:2004, RoHS and CE standards. And it also has a 30-day money back policy. Therefore, you can trust it.



As a 6-stage system, this best reverse osmosis system uses a RO alkaline filter to purify water. This means it can keep healthy miners in the filtered water. These minerals include potassium ions, sodium, magnesium, calcium etc. Other contaminants which are harmful to our health are effetely removed. Compared with ISPRING 75GPD, it is similar to it but there are somewhat different features. The average rating is 4.4 out of 5 stars and there are over 120 positive customer reviews. The installation is also very easy and you can do it yourself without hiring someone. It is highly recommended to have.

Home Master TMAFC Artesian Full Contact Reverse Osmosis Under Counter Water Filtration System, White


The HOME MASTER TMAFC is my favorite one. Although it may be a little costly, it is one of the best ones on the market. Up 98% of chemicals, heavy metals and other contaminants in our water can be removed, while healthy minerals (like magnesium and calcium) are still in our filtered water. This feature is similar to ISPRING 75GPD, because its post filter can add these healthy minerals back in water. Therefore, the filtered water smells and tastes pretty good.

When buying a filter, you also need to know the lifespan of a filter. Fortunately, this model has a long-lasting filter which can provide you up to 2,500 gallons water. This means you don’t need to replace your filter if you use less than 2,500 gallons water per year. The water flow can be double by this system. This feature is also its great, comparing with other normal RO systems.

APEC – Top Tier – Built in USA – Ultra Safe, Premium 5-Stage Reverse Osmosis Drinking Water Filter System (ROES-50)


This model is completely manufactured in US. Up to 99% of contaminants (like arsenic, chlorine, lead, fluoride, heavy metals, bacteria, virus and 1000+ contaminants) can be removed. Its long-lasting filters can be used to treat well water and tap water. Once you have it, you can enjoy refreshing crisp tasting water which may be superior to bottled water.

A 1-year satisfaction guarantee is also included. Its chrome faucet is totally lead-free. The average rating is 4.7 out of 5 stars and there are over 170 customer reviews to check. And its main parts are also manufactured in US. What’s more, its original, top-notch JG Quick Connect fittings can easily prevent leaking, without any extra lock clips or steps. If you need a system completely produced in US, this APEC ROES-50 is a good choice.



The WATTS PREMIER 531418 is also one of the best ones on the market today. This 4-stage filter can offer you pure water to drink and cook. It can filter 50 gallons water per day. It has a compact design. Therefore, if you find that your under sink space is small, you can consider this model. This feature makes it perfect for those involved in cottages, RVs and trailers. It is easy to install. It comes with a long reach chrome faucet. It is also very easy to change its filter, just pushing a button. The price is also reasonable, making it one of the most affordable models on Amazon.

Reverse Osmosis F.A.Qs

As one of the most effective ways to purify water, reverse osmosis has become more and more popular. Many homeowners buy reverse osmosis water filtration systems to purify water to get water to drink, cook or even wash. However, some people know less about reverse osmosis. Fortunately, we have compiled this F.A.Qs for those who don’t know much about reverse osmosis.

1. What’s the definition of Reverse Osmosis?

The core part of a RO system is a semi-permeable membranea that only allows water molecules to pass through. When pressure is applied to one side that water needs to be purified, water molecules is forced to pass through the membrane, while other contaminants are still left in that side. The whole process is called reverse osmosis. This process can separate clean water from contaminants.

2. Commercial vs household reverse osmosis systems?

Actually, they are similar to each other, because the basic procedure is same. The only difference is that commercial or industrial reverse osmosis systems tends to be much stronger than a household model. For example, pumps and spiral would membrane are used in commercial systems, making them much stronger and normally, they are huge in size. However, they are also costly.

3. Is Pretreatment necessary?

The answer is yes. It is recommended to use a pre-filter to remove silt and chorine, because this can prevent the membrane from plugging up or being damaged. The life of a RO system depends on the life of membrane.

4. How much pressure is required to conduct reverse osmosis?

Well, this answer depends on the sediment and salt concentration in the source water. The higher the concentration is, the more pressure is required.

5. How pure is the RO water?

The purity depends on 2 factors. Of course, the membrane is the first factor. Generally, the membrane has a rejection from 92% to 99.5%. Of course, the higher rejection means the feed water can be purified better. The second factor that may make the membrane weak is the types of TDS.

6. How to clean a reverse osmosis system

The place needs to be clean is the RO tank. First, you need to disengage it, and then wash it and clean it.

7. What Is the Extent of maintenance to expect?

Actually, membrane is very weak to many large matters. Therefore, to protect the RO membrane, the pre-treatment water filter should be cleaned every month. This clean process may need 1 hour. If the feed water is very dirty, you need to do this frequently. And you need to make your pre-treatment filter not blocked.

8. How much does run a RO water filter?

If you have a RO system in your kitchen, of course, you need to pay for it. This means the maintenance cost is essential. However, the maintenance cost is influenced by several factors, including the purity of your water, the price of the replacement filters, and the labor. If the feed water is very dirty and contains so many contaminants, the membrane tends to be weak and you need to change its filters frequently. If the price of replacement filters are very high, it will become a burden for you when you need to replace it. If you have to hire someone to maintain your RO system, the labor cost is also a good problem. You’d better change its filter yourself and this process is very easy. This can save some money for you.

9. Can it remove bacteria?

Of course, the answer is yes. The membrane will not allow bacteria to pass by. And a UV sterilization system is used at the storage tank to kill bacteria. This process also happens during its self-cleaning process. Therefore, you’d better choose an opaque tank or just paint the tank black, so algae cannot grow in the tank.

10. When to change its filters

Even if RO membranes can last several years, how long they can last depends on several factors. If a high ion level is noticed in the filtered water, this means you need to change it. Many RO systems include an indicator that will tell you when to change its filters. Generally, every 6 months to 1 year, you need to change the filters.


For, most of us, we may dislike the bad smell and taste in our tap water. And there are actually many contaminates which may cause serious health issues. A RO system is really a must-have investment on our healthy both for ourselves and our families. We also have responsibilities to protect our environment. We can reduce the use of bottled water. Therefore, we can reduce the pressure we place on the environment. If you are looking for the best reverse osmosis system, our list can help you quickly find the right one according to your needs.

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