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Is the water purifier with more cores better? How many cores should I buy?

5 tháng 2, 2026 8:56 AM
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Is the more cores of water purifier better?

Nowadays, water purifiers are equipped with many filters, making users think that the more filters the machine has, the cleaner it is. But is it true that the more filters the water purifier has, the better?

Many buyers buy the machine after hearing from a friend that it cleans well or people around them use it. A machine is considered to have good cleaning ability, which depends largely on the machine's filtering technology. Some products are advertised as clean but in reality do not have such results. Let's find out more about this right after.

Popular filtration technologies on the market today:

RO filtration technology: This is a fairly common reverse osmosis filtration technology in water purifiers when filtering many water sources, especially complex water sources like in Vietnam. The super small filter slot size is only about 0.0001 micrometers, helping to remove bacteria, viruses, heavy metal ions, etc. in water. For water contaminated with alum, a general filter is still needed before entering the filter. This technology cannot retain natural minerals such as magnesium, calcium, sodium, so most current RO water purifiers add other filter cores to add these minerals to the water.

Nano filtration technology: Technology to soften hard water, filter heavy metal ions, impurities about 0.01 micrometer in size, filter more selective water sources than RO technology, suitable for pre-filtered water sources, water after filtration retains micro minerals.

UF filtration technology: This technology can filter large molecules, viruses, and harmful bacteria. The water also retains minerals but will also contain harmful substances.

Thus, choosing a water purifier is not important in terms of how many cores it has, but choosing the right filtration technology for your family's water source.

For the RO filter technology that is most commonly used in water purifiers today, you should pay attention to the first 4 filter cores because they play an important role. In particular, the RO filter core is considered the most important when it determines whether the output water quality is clean, pure, and safe to drink directly or not. From the 5th core onwards, it often plays the role of adding minerals that are beneficial to health.

Detailed uses of 4 RO water purifier filter cores:

  • Core No. 1: removes organic impurities, mud, rust, suspended matter
  • Core number 2: absorbs odors, dissolved organic matter, ammonia, arsenic
  • Core number 3: blocks coarse impurities, mud, heavy metal ions,... larger than 1 micron in size
  • RO membrane: molecular level filtration, completely removes heavy metal ions, arsenic, ammonium, liquefied gas, etc. to produce pure water.

Details of the following cores of the RO water purifier:

  • GAC-T33 core: stabilizes the natural sweetness of water, balances pH
  • Mineral core: add minerals, increase pH
  • Infrared core: water molecules are broken down into smaller pieces thanks to infrared radiation, increasing oxygen in the water.
  • Nano Silver Core: prevents water re-infection in the filter core system

See detailed prices of Mutosi filter cores here .

Thus, the number of filter cores is not as important as the filter technology, the RO filter core is considered the most important, therefore, Buyers should pay attention to whether the quality of the RO membrane has achieved reputable certifications or not.

Mutosi water purifier always focuses on the quality of RO filter membrane, so the company uses Slitec technology RO filter membrane with super small filter size of 0.0001 micrometer, only pure water molecules can pass through. RO membrane has international certification NSF/ANSI 58, which is the highest certification for RO membrane issued by NSF organization of WHO.

Mutosi's RO filter uses a high-quality membrane from the US, certified to remove 99.99% of bacteria, viruses, heavy metal ions, arsenic, and toxic substances in water, for the filtered water source to meet QCVN 6-1:2010/BYT standards for direct drinking water, certified by Vinacontrol and JIS 3201 and JWPA standards in Japan. The filter membrane replacement period is from 24-36 months. Mutosi also provides periodic filter replacement and machine maintenance at customers' homes.

If you are still wondering how many cores to buy a water purifier, this depends on your budget and needs. The more cores a product has, the higher the price and the cost of periodic core replacement. In addition, water usage needs can also determine this:

  • If you use a water purifier for cooking and drinking directly, you can choose a machine with 3-5 filter cores.
  • If you want to add more minerals, increase the pH in the water to help neutralize excess acids in the body, you should choose a water purifier with 7 cores or more.

Hopefully through this article you have clearly understood whether the more cores a water purifier has, the better and have made the right choice for your needs. If you have any questions, do not hesitate to contact hotline 1900 636 595 or chat directly for detailed support from Mutosi staff.

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