Reverse osmosis systems tested in 2026

Reverse osmosis systems under test

The best models compared

Which reverse osmosis system is truly the best? In our comprehensive reverse osmosis system test, we compare current countertop, under-sink, and direct-flow systems under real-world conditions. If you're looking to buy a reverse osmosis system and are unsure which model is right for you, you'll find the perfect overview here.

In our comprehensive reverse osmosis system test, our water filter experts Niko and Benedikt take a close look at various reverse osmosis systems. Which are the best countertop, under-sink, and direct flow reverse osmosis systems in comparison?

Which reverse osmosis system is the best?

Our water filter experts Niko and Benedikt wanted to know exactly that. So we sent them to our water filter kitchen to extensively test popular countertop, under-sink, and direct-flow reverse osmosis devices under real-world conditions. In doing so, we didn't just look at the pure filtration performance. Each osmosis system was tested for installation, noise level, flow rate, maintenance effort, wastewater ratio, and suitability for everyday use. It was important to us: not a laboratory test under ideal conditions, but an honest practical test – transparent, independent, and verifiable.
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Latest tests

Aquantum Water Filter System by H.Preiss in Review – The Strongest Direct-Flow Reverse Osmosis System on the Market?

05 November 2025

H.Preiss WOW Untertisch Osmoseanlage - präsentiert auf einer Granitplatte in der Küche
H.Preiss WOW Osmosis System
The H.Preiss WOW Direct Flow Reverse Osmosis System stands for powerful water treatment with a modern design. Thanks to direct-flow technology, tap water is filtered without intermediate storage and is immediately available fresh. The system delivers up to 1.8 liters of osmosis water per...
From 1.600,00 €
From 1.600,00 €
Arktisquelle Water Filter - Countertop Reverse Osmosis System
Arktisquelle Water Filter - Countertop Reverse Osmosis System
The Arktisquelle water filter is a modern countertop reverse osmosis system that comprehensively filters tap water, sanitizes it, and improves its taste. With its 7-stage SEPTATECH® reverse osmosis, the system removes even microscopic impurities, providing pure drinking water directly from the device at all...
1.199,00 €
1.199,00 €
Evodrop Evofilter Osmoseanlage / Wasserfilteranlage - präsentiert in einer tollen Küche
Evodrop EVOfilter - Under-sink reverse osmosis system from Switzerland
Thanks to its innovative technology, the EVODROP EVOfilter ensures healthy, pollutant-free drinking water – free from microplastics, heavy metals, and bacteria. Developed in Switzerland and multiply certified, the EVOfilter is the perfect solution for anyone who wants to rely on the highest quality.
From 3.449,00 €
3.449,00 €
From 3.449,00 €
Entron-F-Serie-Osmoseanlage-auf-Küchentresen
ENTRON F-Series Undersink Reverse Osmosis System with Mineralization
The ENTRON F-Series Reverse Osmosis Filter is a modern reverse osmosis system with integrated mineralization and practical quick-change technology. It provides you with pure, soft, mineralized drinking water – free from pollutants, drug residues, microplastics, hormones, and heavy metals. Thanks to automatic flushing (of...
1.599,00 €
1.599,00 €
1.599,00 €
Pi Power Compact 300 Osmosenalage: Standard und Special Pi Cell Vitalizer zur Reminalisierung und Energetisierung
PI Power Compact 300 with Cell Vitalizer
The Pi Power Compact 300 is a modern, compact reverse osmosis system that provides fresh, purified water at all times. It operates on the principle of reverse osmosis, one of the most reliable methods for treating drinking water.Since the system does not require a...
From 2.824,00 €
2.824,00 €
From 2.824,00 €
JoMi Frizz-On 20 – Countertop Water Filter with Sparkling Function
JoMi Frizz-On 20 – Countertop Water Filter with Sparkling Function - Schwarz
The JoMi Frizz-On 20 is a modern water filtration system (for up to 10 people) with integrated cooling and sparkling water functions. It operates via a fixed water connection and provides filtered drinking water in various forms – still, chilled, or sparkling. The focus...
From 2.905,00 €
2.905,00 €
From 2.905,00 €
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Osmosis Systems Under Test

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