a photo of Different Types of NU Aqua Water Filters

Clean and safe drinking water is a fundamental necessity for our health and well-being. However, tap water can often contain impurities such as chemicals, sediments, bacteria, and viruses. Water filtration systems offer an effective solution to purify and improve the quality of our drinking water. In this article, we will delve into the world of water filters, examining the different types available and how they work to provide us with clean and healthy water.

Types of Water Filters

Activated Carbon Filters:

  • Activated carbon filters utilize porous carbon material to trap and remove impurities through adsorption.
  • They effectively remove chlorine, sediment, volatile organic compounds (VOCs), and unpleasant odors and tastes.
  • Suitable for treating municipal tap water and commonly used in point-of-use systems.

One of the significant advantages of activated carbon filters is their ability to retain essential minerals present in the water, such as calcium and magnesium, which contribute to the taste and nutritional value of the water. However, it's important to note that activated carbon filters may not be as effective in removing certain dissolved solids, heavy metals, or microbial contaminants. Regular maintenance, including filter replacement, is necessary to ensure their optimal performance.

Activated carbon filters are commonly used in whole house systems, countertop or under-sink filters, as well as in pitcher filters and refrigerator filters. 


a photo of the Whole House Water Filtration System and the Countertop RO System and their Activated Carbon Filter

Reverse Osmosis (RO) Systems:

  • RO systems use a semipermeable membrane to separate impurities from water under high pressure.
  • They can remove up to 99% of contaminants, including dissolved solids, heavy metals, and bacteria.
  • RO systems are commonly installed under the sink or as point-of-use systems.

Let's take the NU Aqua Platinum Series 100GPD RO System for example:

  1. Pre-filters: These are designed to remove sediments, chlorine, and other larger particles that could potentially damage the RO membrane.

  2. RO Membrane: The semipermeable membrane is the heart of the system. It effectively removes contaminants such as dissolved solids, heavy metals, pesticides, bacteria, and viruses.

  3. Post-filters: After the water has passed through the membrane, post-filters may be used to further enhance the taste and quality of the purified water. These filters can target specific impurities and improve the overall water flavor.

a photo of the NU Aqua Tanked and Tankless Reverse Osmosis Systems

For more on this, read Carbon Filters vs. Reverse Osmosis: Which is Best Water Filter for Your Home?

Ultraviolet (UV) Disinfection:

  • UV filters utilize ultraviolet light to deactivate and destroy bacteria, viruses, and other microorganisms.
  • They are chemical-free and particularly effective against microbiological contaminants.
  • UV filters are commonly used in conjunction with other filtration methods.
a photo collage of the NU Aqua UV filters

One of the significant advantages of UV disinfection is that it doesn't introduce any chemicals into the water, making it a safe and environmentally friendly option. UV filters are also relatively low maintenance, requiring periodic replacement of the UV lamp and routine cleaning to ensure optimal performance.

Since UV light works by direct exposure to microorganisms, it may not be effective against certain contaminants that are shielded or protected within larger particles. Additionally, UV filters do not improve the taste or remove dissolved impurities from the water.

Ion Exchange Filters:

  • Ion exchange filters remove specific contaminants by exchanging ions in the water.
  • They are effective in removing dissolved minerals and heavy metals.
  • Ion exchange filters are often used in combination with other filtration methods.

Ion exchange filters can effectively remove various contaminants, including heavy metals like lead, mercury, and cadmium, as well as dissolved minerals like calcium, magnesium, and iron. They contain resins that exchange ions in the water – typically swapping calcium and magnesium (which cause hardness) with sodium or hydrogen ions. This filtration method is particularly beneficial for areas with hard water, as it can soften the water and reduce scaling and mineral buildup in plumbing fixtures and appliances.

The NU Aqua 4 Stage RODI System is a high-grade deionization system tailored for various applications like aquariums, hydroponics, home brewing, and laboratories. It ensures consistent delivery of high-quality water. 

a photo of the NU Aqua Reef Series 4 Stage 75GPD RODI Reverse Osmosis System


Each type of water filter offers unique benefits and operates on different principles. Consider your water quality concerns, source of water, and filtration requirements when selecting a water filter. Further research and consultation with experts or product manufacturers can help you make an informed decision. Visit NU Aqua Systems for a range of water filter options and detailed information.


Disclaimer: The information provided here is for educational purposes only and does not substitute professional advice. When selecting a water filter, it is essential to consider the specific needs of your water source and consult with experts or product manufacturers.

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