Do you want to improve the purity of your drinking water but haven't made your choice yet? We're going to share with you all the essential information about how different water filter models work . We'll also explain the advantages and disadvantages of each, and at the end of the article, we'll present what constitutes one of the best filtration systems to date.

How do different water filter systems work?
When choosing a water filter, it is important to understand how the different systems work . Each system has proven itself in different situations, but above all, you need to take your context into account. Why do you want to equip yourself, in what environment... We present the main water filters on the market and how they work: pre-filter, reverse osmosis filter, activated carbon filter and ceramic filter.
Sediment filter type water pre-filters
Sediment pre-filters are often considered the first line of defense against impurities in household water. Installed at the points of entry (POE) of water into your home, they work by using a fine mesh or fibers that trap solid particles (sand, rust, and other large sediments) present in the water. The main benefit of sediment pre-filters is that they protect your other upstream home filtration systems. This way, you extend the life of your household appliances and their filters.
This is especially interesting because pre-filters are much less expensive to maintain and replace than other types of filters. However, you should be aware that this technology only stops large sediments. Chemical or microbiological contaminants are not filtered. Bacteria, heavy metals, pesticides. All of these elements pass through the mesh of sediment filters.
Therefore, we recommend using this type of filter only as a supplement. It should be combined with other, more precise systems to ensure high-quality drinking water.
✅ Advantages of water pre-filters:
- Protection of downstream filtration systems;
- Longer lifespan of household appliances;
- Low maintenance and replacement cost.
❌ Disadvantages of water pre-filters:
- Failure to eliminate chemical or microbiological contaminants.
Reverse osmosis filtration systems
Reverse osmosis (RO) is an advanced filtration process that uses a semi-permeable membrane to remove virtually all contaminants from water. This method produces extremely pure water, which is why this type of filter is used in medical and industrial applications.
This solution also has some drawbacks. Reverse osmosis filtration systems are expensive to purchase and maintain . Second, the process consumes a lot of water, as a large amount of liquid is released as waste. In addition to the ecological aspect, excessive water consumption will also impact your daily budget.
Finally, the reverse osmosis water filter removes both harmful microelements and beneficial minerals like calcium and magnesium. As a result, water filtered by this system may require remineralization to remain safe for consumption.
✅ Advantages of reverse osmosis filters:
- Elimination of almost all contaminants.
- Production of extremely pure water.
❌ Disadvantages of reverse osmosis filters:
- High initial and maintenance cost.
- Excessive water consumption.
Activated carbon water filters
Activated carbon has the ability to absorb contaminants in water thanks to its extremely porous surface that attracts and retains particles. The activated carbon filter is particularly effective at removing organic chemicals, unpleasant tastes and odors , as well as certain heavy metals. The water is then much more pleasant to consume.
Another advantage is that they are very affordable, easy to install, and 100% natural . This is also the reason for their great popularity among consumers. It is the ideal solution for simple and effective filtration. However, activated carbon does not ensure complete filtration of microorganisms. In addition, it quickly becomes saturated with contaminants, which reduces its effectiveness. You must therefore change the carbon very regularly or know how to clean your filter for optimal treatment of your water .
The perfect solution is, for example, to combine carbon and ceramic filtration . This increases the purification efficiency and improves the lifespan of the components.
✅ Advantages of activated carbon filters:
- Removal of organic chemicals.
- Improved taste and odor of water.
- Easy to install & natural.
- Very economical to purchase and use.
❌ Disadvantages of activated carbon filters:
- No filtration of microorganisms.
- Requires frequent replacement or cleaning of the water filter.
Ceramic filtration systems
Ceramic filtration systems use porous ceramic to remove contaminants from water. These filters are particularly effective at removing bacteria and microbiological pathogens . They also have the advantage of being reusable after simple cleaning. In the long run, they are therefore particularly environmentally friendly and economical.
However, since they do not remove chemical contaminants, such as pesticides and heavy metals, it is best to use them with an activated carbon solution for better effectiveness.
✅ Advantages of ceramic filters:
- Effective against bacteria and pathogens.
- Can be reused after cleaning.
❌ Disadvantages of ceramic filters:
- Failure to eliminate chemical contaminants.
Now that you know how the main water filters work , you can see that there is no perfect solution unless you combine several technologies. That's why at Pureva, we have created an innovative system that will treat your water efficiently, quickly and conveniently!

How does the Pureva combination water filter work?
At Pureva , we've found the ultimate solution to help you achieve pure, better-tasting water. Our stainless steel filter cartridge contains a diatomaceous earth dome enriched with a coconut fiber activated carbon core.
This unique filtration system purifies water while preserving natural minerals that are beneficial to health . It removes more than 30 pollutants, including chlorine, limescale, pesticides, microplastics, drug residues, as well as bacteria and viruses. The main idea is to benefit from a practical and effective solution for obtaining superior quality water without reducing the flow of your faucet or sacrificing your budget.
We mentioned above that carbon filters need to be changed frequently. It's true! But don't panic, we've got you covered. We offer a subscription service with automatic delivery of your new filter every 3 months. With Pureva, you combine the benefits of the best filtering technologies to enjoy pure, healthy water, rich in minerals, and free of any trace of contaminants.