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01/29/2026

The gravity water purifier Pure Filters

What is Pure Filters gravity water purifier?

Pure Filters is at the forefront of domestic water purification. With AISI 304 food-grade stainless steel tanks and innovative Coldstream FTO+ filters, our system uses gravity to filter water without the need for electricity or plumbing.

It is specifically designed to provide water of exceptional purity and safety that is easily accessible.

Why choose Pure Filters tanks?

Made of AISI 304 food-grade stainless steel, our tanks combine exceptional durability with food safety. They have been tested in outdoor conditions, proving their corrosion resistance. Their design includes a reinforcement for easy handling, combining aesthetics, functionality and robustness.

What are the benefits of Coldstream FTO+ filters?

At the heart of our purification system, Coldstream FTO+ filters offer a tailored answer to modern water filtration requirements.

Equivalent to the performance of state-of-the-art filters such as the Black Berkey, without the use of coconut charcoal, these filters combine innovative ceramic and activated carbon, free of animal-derived components. They provide effective filtration against a wide range of contaminants, including bacteria, viruses, heavy metals, chemicals as well as specifically fluoride and nitrates.

This performance is maintained consistently over a period of 6 months or 1500 liters for two cartridges, outperforming traditional systems in the filtration of these specific contaminants.

What makes Pure Filters stand out?

Pure Filters clearly stands out from traditional alternatives such as Berkey and Doulton thanks to:

• Its unique ability to reduce nitrates and fluoride over a long period of time, ensuring consistent water quality.

• The superiority and durability of its AISI 304 food-grade stainless steel tanks.

• An exceptional quality-price ratio with, for example, the 12L model at 383 euros including 2 FTO+ filters, combining economy and filtration efficiency in the long term.

• The manufacturing process for Coldstream cartridges represents a major breakthrough in the field of water filtration. Through an innovative high-pressure casting process, Coldstream precisely combines ceramic and activated carbon to form a unique filtration matrix. This specific process creates extremely fine and evenly distributed pores throughout the filter, allowing for efficient and consistent removal of a wide range of contaminants, including bacteria, viruses, heavy metals, as well as fluoride and nitrates.

The use of high-quality materials, such as advanced ceramics and a specifically selected activated carbon, ensures that each cartridge has exceptional filtration capacity and increased longevity. In addition, the activated carbon used in Coldstream filters is chosen for its superior absorbent properties. This manufacturing process, distinguished not only by its ability to produce high-performance filters, but also by its commitment to sustainability and environmental efficiency, makes Coldstream cartridges a premier water filtration solution for health-conscious and environmentally conscious consumers.

Ceramics are made from a range of natural materials, mainly diatomaceous earth. They are fossilized microorganisms formed from calcium carbonate or limestone. Their structure has a large surface area and, once made of ceramic, it creates a complex and porous structure. This structure traps particles, bacteria and other microorganisms present in the water. The ceramic is enriched with ionized silver, a bacteriostatic agent that prevents the growth of microorganisms on the surface of the filter between uses, without chemical action on the filtered water.

Cost-effectiveness comparison

For example, although Black Berkey cartridges have a higher initial cost, with around 220 euros for a set capable of filtering up to 21,000 liters (2 Coldstream FTO+ filters cost an average of 89 €) in the best conditions, it is important to highlight the advantage of Coldstream in the specificity of nitrate and fluorine filtration over a period of 6 months and/or 1500 liters for two cartridges.

This indicates that, for specific filtration needs such as nitrates and fluoride, which are growing concerns for many users, Pure Filters offers a targeted and effective solution.

In addition, regular replacement of Coldstream FTO+ cartridges ensures consistent filtration quality also on other contaminants. It should be noted that in the long term, Black Berkey filters will see their competence decrease over time; which makes sense given the adsorption process fixing contaminants on the media; the user who wants to achieve the same average removal will choose Pure Filters with Coldstream FTO+ filters, a point that may be particularly relevant for priority users on these specific contaminants.

What water can I purify with the Pure Filters Water Purifier?

The Pure Filters Water Purifier is versatile and efficient, designed to purify:

  • Tap water
  • Raw spring water (streams, lakes, rivers, ...)
  • Rainwater

while preserving the mineral salts present in the water.

Tap water : Transform tap water into better quality water than bottled water, effectively removing chlorine, heavy metals, and various contaminants.

Raw spring water : Make water from rivers, lakes, or wells perfectly drinkable with comprehensive filtration.

Rainwater : Convert rainwater into a pure, contaminant-free resource for home use.

Pure Filters embodies our commitment to superior water quality, offering autonomy and safety to our users in all situations, even in the event of a break in normality.