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iSpring 6-Stage Reverse Osmosis System review

iSpring 6-Stage Reverse Osmosis System

If you are looking for a quality, best budget RO Water Filter systems , iSpring 6-Stage Reverse Osmosis System model is your best choice. It is convenient, affordable, high-capacity, and nature-based device. Let’s see the full list of its pros, cons, and features.

Key features

6-stage filtration

This device has three pre-filters and three regular filters. The filters responsible for preparation of the water for standard filtration process are PP sediment filter, the carbon KDF filter, and the carbon block (CTO) filter. The key role of these three filters is the removal of large contaminants from the water. Furthermore, these three filters protect the reverse osmosis membrane from chlorine and chloramines.

The next stage of filtration is based on the classic reverse osmosis system. It removes water impurities down to 0.0001 microns. Next, the GAC filter and alkaline remineralization filter prepare the water for the end user. Such water is tasty, full of healthy minerals, and odorless.

Alkaline remineralization system

The standard reverse osmosis system removes the useful minerals together with the pollutants. As users want to get the beneficial minerals together with their water, the alkaline remineralization filter enriches this purified water, making it healthy, balanced, and providing it its natural pH value.

5-gallon capacity

This water purification system has a 5-gallon capacity, which is enough to satisfy any family or workplace clean water requirements.


This water purifier is the best budget device you can find in the market with these technical specifications. Affordability and high quality are its strongest assets.


  • Affordable
  • Durable
  • Easy to use
  • Easy to maintain
  • 6-stage filtration system
  • 5-gallon capacity
  • up to 10 gallons of purified water per day
  • 1:3 pure/waste ratio
  • natural stone filters
  • alkaline remineralization system
  • leak-free system
  • FDA-approved
  • designed according to the NSF/ANSI standards
  • holds the WQA Gold Seal certification
  • fits under the sink.


  • Not so easy to install.

Frequently Asked Questions

How heavy is this water purifier?

Answer: It is 20 pounds, i.e. 9 kg heavy. As it has a 5-gallon capacity, this is a relatively good weight for this type of device.

Where can I get the filters?

Answer: You can buy the filters from the manufacturer or from one of the many certified, accredited online reverse osmosis water purification filter dealers. You will find various packages, including the 1-year, 2-year or 3-year filter pack. Keep in mind that different filters have to be changed after a different period of time. Namely, the FP15, or the so-called sediment filter, should be replaced each 3-6 months, as well as the FG15, or the carbon filter, the stage 3 carbon block filter, and the alkaline filter. On the other hand, the reverse osmosis membrane should be replaced every two years. The FT15 post-RO filter should be replaced annually.

What are these filters made of?

Answer: The filters are made of natural stones. This is one of the greatest benefits of this device, as this is the healthiest options there is in the market currently.

What are the technical specs when it comes to the pressure, temperature, and the TDS?

Answer: The incoming water pressure ranges between 45 and 70 PSI. The allowed water temperature ranges between 40 and 100 °F, while the maximum TDS equals 750 ppm.

How much time do I need to install this water purifier?

Answer: This depends on your skills. You will need several hours. Some users state that installation was not so easy and that they had to call the customer support service to help them with the assembly. This is, at the same time, the only disadvantage of this device.

What kind of impurities does this water purifier model remove?

Answer: This device removes up to 99% of more than 1,000 different kinds of contaminants. These include lead, fluoride, various hormones, chlorine, arsenic, asbestos, sodium, bacteria, calcium, viruses, etc.

What kinds of certifications does this device have?

Answer: This device is very good when it comes to different certificates. Those include the NSF/ANSI standard, the WQA Gold Seal awarded by the Water Quality Association in 2018, as well as the FDA quality control certificate.


The iSpring 6-Stage Reverse Osmosis System water purifier is the best affordable, high-quality water filtration device in the market. Apart from being sold at a very good price, it is compliant with all national food and water-related device safety regulations. It is durable and its 6-stage system protects you from over 1,000 different contaminants. Its 5-gallon capacity makes it perfect for families and workplaces.

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