For hygiene reasons, the recommended replacement interval is 6 to a maximum of 12 months. Earlier replacement within this period may be necessary if the water flow is noticeably reduced. This is not a defect in the filter, but rather an indication of increased contamination from fine particles in the raw water.

The actual maintenance interval may vary depending on the size of the home, water hardness, water consumption, the plumbing system, and other external factors. Based on this, we will inform you individually of the optimal replacement time.

dropvital guarantees a service life of 12 months, unless otherwise agreed in writing.

A nano-home replacement filter costs 499 EUR.

For an additional charge of 200 EUR, one of our service technicians will be happy to replace the filter for you.

Important Information: There are no additional costs for you. No electricity, no wastewater fees, no other maintenance contracts, and no hidden costs.

You can easily perform the maintenance yourself. With each cartridge, you'll receive a QR code that links to maintenance instructions in your preferred language, as well as a clear, step-by-step video.

In general, it is important to understand: If a supplier claims, for example, that it filters out pesticides, then this statement is theoretically correct—depending on the pore size of the filter. For traditional activated carbon filters, this is typically a maximum of 0.1 micrometer.

Contaminants with particle sizes smaller than this pore size cannot be physically retained. In practice, this means that not all dissolved substances are effectively removed. Many suppliers remain vague on this point and do not publish specific information about pore size. Insist on transparent evidence.

Conventional activated carbon filters operate in the range of about 0.1 micrometers.

Dropvital, on the other hand, has demonstrated in independent laboratory tests conducted by the international testing institute SGS that the nano-home achieves effective filtration down to 0.002 micrometers.

The key difference lies in the structure of the filter material. With nano-home, the design ensures that trapped substances are not released back into the water. With traditional activated carbon filters, channeling can develop in the filter bed over time, causing filter performance to decline.

Nano-home is designed to last up to 12 months and is replaced annually.

Yes, nano-home filters out over 99% of short-chain PFAS and TFA from the water—as verified by a Swiss laboratory.

Filtration device and testing method

• Filtration device: nano-home
• Testing conducted at a Swiss laboratory in Zurich.
• Sampling and analysis period: November 5, 2024 – November 25, 2024
• Method: LC-MS/MS (Liquid Chromatography – Mass Spectrometry)

Results

• Trifluoroacetate (TFA)
  Before: 0.738 µg/l
  After: Not detectable (reduction: 100%)
• Perfluoropropanoic
  acid Before: 0.383 µg/l
  After: Not detectable (reduction: 100%)
• Trifluoromethanesulfonic acid (TFMSA)
  Before: 0.394 µg/L
  After: Not detectable (reduction: 100%)
• Perfluoroethanesulfonic
  acid Before: 0.399 µg/l
  After: Not detectable (reduction: 100%)
• Perfluoropropanesulfonic
  acid Before: 0.371 µg/l
  After: Not detectable (reduction: 100%)

Conclusion

The test results underscore the excellent effectiveness of dropvital in filtering PFAS. While nano-drink demonstrated impressive reductions of up to 100% in several categories, nano-home achieved complete removal (100%) in all tested substances.

The deliberate decision not to test long-chain PFAS is based on well-established scientific findings that these substances typically already bind to surfaces or materials and can therefore be retained in upstream processes.

The results confirm the high quality and reliability of these filtration devices for use in water treatment.

The complete laboratory report is available upon request.

The carbon structure used in nano-home is built up using a wet-spinning process on fiber-based carrier materials such as rayon; it is then carbonized, activated, and processed into a highly structured membrane.

This process allows us to achieve an extremely high specific surface area (m²/g) compared to conventional activated carbon filters. The cartridges consist primarily of micropores with a diameter of ≤ 2 nanometers.

Conventional activated carbon filters, on the other hand, rely primarily on mesopores and macropores (10–50 nanometers and ≥ 50 nanometers, respectively), which are significantly larger.

In other words:

Nano-home filters down to 0.002 micrometers, while standard activated carbon filters typically filter down to about 0.1 micrometers.

No. The nano-home does not have a built-in limescale protection module. The nano-home is designed exclusively for filtering contaminants, not for descaling.