
Reverse Osmosis - Provides ultra-pure water
Reverse osmosis water purification systems are designed to produce clean water by removing impurities, dissolved salts, and other contaminants from raw water.
Reverse osmosis (RO) is a filtration technology that uses a semi-permeable membrane to remove ions, molecules, and larger particles from water.
- Ecosoft Cross Solo - Reverse Osmosis€334.14 €267.31
Enjoy fresh, clean and great-tasting drinking water straight from the tap with Ecosoft Cross Solo.
This compact and intelligent reverse osmosis system with direct flow delivers pure water in just seconds – completely without a storage tank.The system removes up to 99.8% of contaminants, including chlorine, heavy metals, pesticides, nitrates, bacteria, viruses and PFAS (“forever chemicals”).
You’ll always have healthy, crystal-clear water for drinking, cooking and coffee – without the need for plastic bottles.Cross Solo uses an advanced reverse osmosis membrane and an efficient flow pump that ensure a stable water supply with minimal waste.
The elegant, space-saving design fits perfectly under the sink – ideal for homes, cottages and offices.Benefits:
- Effectively removes chlorine, heavy metals, nitrates, pesticides and PFAS
- Protects against bacteria and viruses without the use of chemicals
- Direct flow – pure water in seconds, no pressure tank required
- Low water waste and high efficiency
- Compact design, perfect for small kitchens
- Easy installation and tool-free filter replacement
Out of stock - Replacementfilter - Ecosoft Cross Solo€146.65 €117.32
Keep your Ecosoft Cross Solo system performing at its best with this replacement filter.
It combines a 500 GPD reverse osmosis membrane and an activated carbon filter in a compact 2-in-1 design, ensuring continuous access to fresh, clean and great-tasting water straight from the tap.The advanced filter removes up to 99% of impurities, including limescale, chlorine, heavy metals, pesticides, nitrates, bacteria, viruses and PFAS (“forever chemicals”).
At the same time, it improves taste and odor, providing crystal-clear water – perfect for drinking, cooking and coffee.The replacement filter is easy to change without tools and fits perfectly into the Ecosoft Cross Solo system.
Benefits:
- 2-in-1 filter with RO membrane and activated carbon
- Removes up to 99% of contaminants, including PFAS
- Improves taste and reduces odor
- Ensures stable water supply and low wastewater
- Quick and tool-free replacement
Filter should be replaced every 12 months.
Out of stock - AQUAPHOR RO-202s Pro - Reverse Osmosis€601.98 €481.58
Enjoy fresh, clean and great-tasting water straight from your tap with Aquaphor RO-202S Pro. This compact, intelligent reverse osmosis system removes up to 99.9 % of bacteria, viruses, limescale and harmful substances such as chlorine, pesticides, heavy metals, nitrates and PFAS.
The built-in 5 L storage tank and integrated pump ensure a stable water supply even with low inlet pressure. Its advanced 4-stage filtration purifies the water thoroughly and adds natural magnesium minerals for a balanced, refreshing taste.
With digital control, TDS monitoring and a filter status indicator, you can easily track your water quality.
The system is space-saving, easy to install and low-maintenance – filter changes take seconds with the Twist-and-Lock design.Benefits:
- Removes limescale, chlorine, pesticides, heavy metals and PFAS
- Eliminates bacteria and viruses without chemicals
- Adds magnesium for better taste and health
- 5 L integrated tank – water always ready
- Built-in pump for low water pressure
- Digital TDS monitor and filter status display
- Compact under-sink design
- Quick, tool-free filter replacement
- 100 GPD membrane (≈ 380 L/day)
- Replacementfilters - AQUAPHOR RO-202s Pro€173.43 €138.74
This complete replacement set is designed for the AQUAPHOR RO-202S Pro and ensures that your system continues to deliver crystal-clear, healthy, and great-tasting drinking water of the highest quality.
Includes and benefits:
- 1x Pro 1 pre-filter – removes sand, rust, and larger particles
- 1x Pro 2 filter – reduces chlorine, organic compounds, and unpleasant taste/odor
- 1x Pro 100 RO membrane – advanced reverse osmosis membrane that removes heavy metals, nitrates, bacteria, and up to 99% of dissolved solids
- 1x Pro HFM filter (2-in-1) – mineralization and antibacterial filter that adds beneficial minerals such as magnesium and provides extra protection against bacterial growth
With this replacement set, your AQUAPHOR RO-202S Pro stays in top condition – delivering safe, fresh, and great-tasting water straight from the tap.
Out of stock - AQUAPHOR Osmo Pro 50 - Reverse Osmosis€233.70 €186.96
Get fresh, clean and great-tasting drinking water straight from the tap with Aquaphor Osmo Pro 50. This compact reverse osmosis system removes up to 99.9 % of bacteria, viruses, limescale and harmful substances such as chlorine, pesticides, heavy metals and nitrates.
With its 10-litre storage tank you always have plenty of pure water ready for drinking, cooking and coffee – without plastic bottles.
The innovative Pro 1 pre-filter protects the RO membrane from particles and extends its service life, while the advanced Pro HFM cartridge provides extra protection against bacteria and adds magnesium to improve both taste and health.
The system is space-saving, easy to install and requires minimal maintenance – filter replacement is quick and tool-free.
Benefits:
• Effectively removes limescale, chlorine, pesticides and heavy metals
• Protects against bacteria and viruses without chemicals
• Adds magnesium for better taste and health
• 10 L tank – always fresh filtered water at hand
• Space-saving design for small kitchens
• Simple, tool-free filter replacement
• 50 GPD membrane (≈ 190 L/day) - Replacement Filter - AQUAPHOR Osmo Pro 50€136.47 €109.18
This complete replacement set is designed for AQUAPHOR Osmo Pro 50 and ensures your system continues to deliver soft, healthy and great-tasting water of the highest quality.
Includes and benefits:
- 1x Pro 1 pre-filter – removes sand, rust and larger particles
- 1x Pro 50 RO membrane – advanced reverse osmosis, removes heavy metals, nitrates, bacteria and up to 99% of dissolved solids
- 1x Pro HFM filter (2-in-1) – mineralization filter adding beneficial minerals like magnesium, plus a bacteria filter for extra protection
- Easy replacement – keeps the system in optimal condition
- Capacity up to 12 months depending on water quality and usage
Keep your AQUAPHOR Osmo Pro 50 performing at its best – for crystal-clear, safe and fresh drinking water straight from the tap.
- AQUAPHOR Osmo Pro 100 - Reverse Osmosis€267.18 €213.74
Get fresh, clean, and great-tasting drinking water straight from your tap with the Aquaphor Osmo Pro 100 . This compact reverse osmosis system is designed to remove up to 99.9% of bacteria, viruses, limescale, and harmful substances such as chlorine, pesticides, heavy metals, and nitrates.
With its 10-liter storage tank, you will always have plenty of pure water ready for drinking, cooking, and coffee – without the need for plastic bottles.
The innovative Pro 1 pre-filter protects the membranes from particles and ensures a longer lifespan for the reverse osmosis membrane, while the advanced Pro HFM cartridge provides extra protection against bacteria and at the same time adds magnesium, improving both taste and health benefits.
The system is space-saving, easy to install, and requires minimal maintenance – filter replacement is quick and tool-free.
Benefits:
- Effectively removes limescale, chlorine, pesticides, and heavy metals
- Protects against bacteria and viruses without chemicals
- Adds magnesium for better taste and health
- 10 L tank – always fresh filtered water at hand
- Space-saving design for small kitchens
- Easy, tool-free filter replacement
- Replacement Filter - AQUAPHOR Osmo Pro 100€153.88 €123.10
This complete replacement set is designed for AQUAPHOR Osmo Pro 100 and ensures your system continues to deliver soft, healthy and great-tasting water of the highest quality.
Includes and benefits:
- 1x Pro 1 pre-filter – removes sand, rust and larger particles
- 1x Pro 100 RO membrane – advanced reverse osmosis, removes heavy metals, nitrates, bacteria and up to 99% of dissolved solids
- 1x Pro HFM filter (2-in-1) – mineralization filter adding beneficial minerals such as magnesium, plus a bacteria filter for extra protection
- Easy replacement – keeps the system in optimal condition
- Capacity up to 12 months depending on water quality and usage
Keep your AQUAPHOR Osmo Pro 100 performing at its best – for crystal-clear, safe and fresh drinking water straight from the tap.
- AQUAPHOR RO-101s - Reverse Osmosis€320.75 €256.60
AQUAPHOR RO-101s is an advanced reverse osmosis system that provides clean drinking water directly from the tap with up to 99.99% protection against bacteria and viruses.
Designed to be compact and practical, the RO-101s includes a built-in 5-liter tank that ensures fresh, filtered water is always available. It takes up half the space of traditional RO systems and is engineered to use less water, making it both eco-friendly and economical.
Includes and benefits:
- K1 pre-filter – combined mechanical and carbon filtration, removes sand, rust, iron and impurities
- K2 pre-filter – fine filtration down to 3 µm, reduces chlorine and organic substances
- RO-50S membrane (50 GPD ≈ 190 L/day) – advanced reverse osmosis, removes heavy metals, nitrates, fluoride, bacteria, viruses and up to 99.99% of dissolved solids
- K7BM filter – remineralization filter adding magnesium, plus antibacterial protection
- Separate tap and fittings – included for easy installation
- Compact, efficient and user-friendly solution for the whole family
With AQUAPHOR RO-101s, you get fresh, safe and mineralized drinking water – a healthy and cost-effective alternative to bottled water.
- Replacement filter - AQUAPHOR RO-101s€107.00 €85.60
Replacement Filters for RO-101S EU
Contains the following filters:
- K1
- K2
- K7M
- RO50S - Membrane
- Leasing - BRITA PROGUARD Gastronomy 200€176.11 €140.89
Leasing BRITA PROGUARD Gastronomy 200 – Omvendt Osmose til Professionelle Køkkener
BRITA PROGUARD Gastronomy 200 er det ideelle valg for professionelle køkkener, der ønsker pletfri resultater og maksimal driftssikkerhed. Dette avancerede omvendt osmose-system beskytter effektivt opvaskemaskiner og ovne mod kalk, gips og korrosion – selv under skiftende vandforhold – og leverer filtreret vand i topkvalitet til alle formål.
Med en kapacitet på op til 200 liter i timen (ved 25°C) og en effektiv salttilbageholdelsesrate på mindst 97 %, sikrer systemets dobbelte RO-membraner en konstant høj vandkvalitet og reducerer behovet for vedligeholdelse og rengøring.
Den intuitive skærm giver brugeren fuldt overblik over driften og gør både betjening og fejlfinding enkel. Systemets kompakte design passer perfekt under de fleste borde og arbejdsstationer, hvilket gør det til en fleksibel løsning i både små og store køkkener.
Fordele ved leasing:
- Fås med leasingaftale på 24, 36 eller 48 måneder
- Undgå store engangsudgifter – betal i faste månedlige rater
- Inkluderer support og årlig serviceaftale med inkluderet membran og filterskift.
Spar tid, energi og penge – og oplev forskellen med BRITA PROGUARD Gastronomy 200 i dit køkken.
- Replacementfilters - AQUAPHOR RO-202s€160.04 €128.03
This complete replacement set is designed for AQUAPHOR RO-202s and ensures your system continues to deliver safe, soft and mineralized drinking water straight from the tap.
Includes and benefits:
- 1x K1 pre-filter – filters sediment, dirt and impurities up to 10 µm
- 1x K2 pre-filter – fine filtration down to 3 µm, removes small particles and dirt
- 1x RO-100s membrane – advanced reverse osmosis, removes hard salts, limescale, nitrates, fluoride, bacteria, viruses, hormones and antibiotics
- 1x K7BM filter – removes bacteria and mineralizes the water with essential minerals
- Easy replacement – keeps your system in optimal condition
With this replacement set, your AQUAPHOR RO-202s stays in top shape – for crystal-clear, safe and healthy drinking water for the whole family.
- BRITA PROGUARD Gastronomy 200 - Reverse Osmosis€3,347.41 €2,677.93
The BRITA Proguard Gastronomy 200 is a highly efficient reverse osmosis filtration system designed to meet the varying and demanding needs of professional kitchens. The system delivers top-class water filtration for dishwashers and ovens, ensuring spotless utensils, glasses, and crockery. It reduces downtime by protecting appliances from lime scale, gypsum, and corrosion, even under changing water conditions.
Key features of the Proguard Gastronomy 200 include two premium reverse osmosis membranes with a salt retention rate of at least 97%, ensuring excellent protection against impurities, lime scale, and unwanted minerals.
The system's high flow rate can accommodate varying needs, from low to constantly high, with a capacity of up to 200 liters per hour at 25°C, and 140 liters per hour at 15°C.
Additionally, it includes a user-friendly display that shows all relevant performance data, enhancing operation and maintenance.
This system not only ensures the operational efficiency of kitchen equipment but also helps reduce energy consumption and cleaning times thanks to its high capacity and powerful flow rate. Its compact design allows it to fit easily under counters, making it a versatile solution for many professional kitchen setups
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- Prefilter – BRITA PROGUARD Gastronomy 200€186.82 €149.46
Activated Carbon Filter – BRITA PROGUARD Gastronomy 200
This activated carbon filter functions as a pre-filter and is developed exclusively for use with the BRITA PROGUARD Gastronomy 200. It plays a key role in the system’s advanced water treatment process.
The filter effectively retains coarse particles down to 5 microns (µm) and reduces chlorine, organic compounds, and other substances that affect the taste and odour of raw water.
By improving water flavour and smell, the filter also protects downstream filtration stages and your equipment – ensuring optimal performance and reduced maintenance.
Only compatible with BRITA PROGUARD Gastronomy 200.
- APRO 100 - Reverse Osmosis€949.38 €759.50
With an APRO 100, you get a solution that is absolutely optimal for companies that have a dishwasher attached. APRO 100 extends the life of the company's kitchen appliances, as it e.g. contributes to the formation of rust remaining minimal.
An APRO 100 system will, with the help of reverse osmosis technology, remove almost all unnecessary particles in the water. The pre-filtration for APRO 100 is specially designed and consists of 2 filter housings. 1 with 5µm prefiltration and 1 with Active carbon to encapsulate some of the limescale and thus you get a result that is optimal for e.g. washing glasses, plates, etc.Advantages of the APRO 100 include:
- Can produce up to 100 l/h
- Cost effective
- Includes Gross 10" DUO-prefiltration
- Includes connecting hoses and fittings.
- Space-saving design
- Long lifetime for the membrane
- The system is plug & play
- The boosterpump saves up to 50% on the electricity bill
- This version is made of stainless steel.
An RO-Membrane cannot handle large amounts of lime. If APRO 100 PRO is to be used in an area with a high lime content in the water, Filter-Online strongly recommends the installation of e.g. a water softener to soften the water before entering the APRO 100.
- RO Membrane - BRITA Proguard Gastronomy 200€374.31 €299.45
Membrane Set – For BRITA PROGUARD Gastronomy 200
This membrane set includes two high-quality reverse osmosis membranes, designed exclusively for use with the BRITA PROGUARD Gastronomy 200.
With an impressive salt retention rate of ≥ 97%, the membranes provide effective protection against:
- Corrosion
- Limescale buildup
- Gypsum formation
- Other contaminants
By reducing the level of unwanted minerals and particles in the water, the membranes extend the lifespan of your equipment and help maintain consistently high water quality – ideal for professional gastronomy where flavour and reliability are key.
Note: Only compatible with BRITA PROGUARD Gastronomy 200.
- APRO 100 - Reverse Osmosis€1,137.68 €910.14
With an APRO 100, you get a solution that is absolutely optimal for companies that have a dishwasher attached. APRO 100 extends the life of the company's kitchen appliances, as it e.g. contributes to the formation of rust remaining minimal.
An APRO 100 system will, with the help of reverse osmosis technology, remove almost all unnecessary particles in the water. The pre-filtration for APRO 100 is specially designed and consists of 2 filter housings. 1 with 5µm prefiltration and 1 with Active carbon to encapsulate some of the limescale and thus you get a result that is optimal for e.g. washing glasses, plates, etc.Advantages of the APRO 100 include:
- Can produce up to 100 l/h
- Cost effective
- Includes Gross 10" DUO-prefiltration
- Includes connecting hoses and fittings.
- Space-saving design
- Long lifetime for the membrane
- The system is plug & play
- The boosterpump saves up to 50% on the electricity bill
- This version is made of stainless steel.
An RO-Membrane cannot handle large amounts of lime. If APRO 100 PRO is to be used in an area with a high lime content in the water, Filter-Online strongly recommends the installation of e.g. a water softener to soften the water before entering the APRO 100.
- APRO 100 Pro - Reverse Osmosis€1,264.10 €1,011.28
An APRO 100 PRO is a reverse osmosis system that has been specially developed to be connected to a professional coffee setup.
APRO 100 PRO carefully removes all the impurities that affect the taste of a coffee or espresso. At the same time, the system leaves the necessary minerals that are essential to achieve a rich coffee taste, refreshing tea or just clean water.
The mineralization is easy to adjust and runs completely stably. This is easily done on the knob on the front of the system.
Advantages of APRO 100 PRO:
- Ultra-low energy consumption - Patented technology
- User-friendly operation
- Adjustable mineralization via bypass
- Stable taste
- Compact design
- Easy maintenance
- Can produce up to 100 l/h
- Includes Gross 10" DUO-prefiltration
- Includes connecting hoses and fittings.
- The system is plug & play
- The boosterpump saves up to 50% on the electricity bill
An RO-Membrane cannot handle large amounts of lime. If APRO 100 PRO is to be used in an area with a high lime content in the water, Filter-Online strongly recommends the installation of e.g. a water softener to soften the water before entering the APRO 100 PRO.
- APRO 100 Pro - Reverse Osmosis€1,458.29 €1,166.63
An APRO 100 PRO is a reverse osmosis system that has been specially developed to be connected to a professional coffee setup.
APRO 100 PRO carefully removes all the impurities that affect the taste of a coffee or espresso. At the same time, the system leaves the necessary minerals that are essential to achieve a rich coffee taste, refreshing tea or just clean water.
The mineralization is easy to adjust and runs completely stably. This is easily done on the knob on the front of the system.
Advantages of APRO 100 PRO:
- Ultra-low energy consumption - Patented technology
- User-friendly operation
- Adjustable mineralization via bypass
- Stable taste
- Compact design
- Easy maintenance
- Can produce up to 100 l/h
- Includes Gross 10" DUO-prefiltration
- Includes connecting hoses and fittings.
- The system is plug & play
- The boosterpump saves up to 50% on the electricity bill
- This version is made of stainless steel.
An RO-Membrane cannot handle large amounts of lime. If APRO 100 PRO is to be used in an area with a high lime content in the water, Filter-Online strongly recommends the installation of e.g. a water softener to soften the water before entering the APRO 100 PRO.
- RO Membran Capsuled - APRO 100-NP (ULP3213-1000)€140.49 €112.39
Membrane incl. Housing.
Assembled and therefore easy to replace in the system.
The membrane in the housing is an APRO 3012-400
The membrane fits the following Reverse Osmosis systems:
- APRO NP 80
- APRO NP 120
- APRO 120
- XLP11-4021 - RO Membrane€249.77 €199.82
The XLP11-4021 is an RO (reverse osmosis) membrane designed to efficiently remove impurities, salts, and harmful substances from water. It operates at low pressure, reducing energy consumption, and is ideal for small to medium-sized water treatment systems.
With stable filtration capacity, it ensures clean and safe water. The membrane has a long lifespan and low maintenance costs.
- LP21-4040, RO Membrane, HS, HP€367.48 €293.98
The LP21-4040 is an efficient RO (reverse osmosis) membrane designed to remove impurities, salts, and harmful substances from water. With a high filtration capacity, it ensures clean and safe drinking water, making it ideal for both industrial and commercial applications.
The membrane has a long lifespan, high efficiency, and helps reduce maintenance costs in water treatment systems.
- XLP22-8040 - RO Membrane€1,322.49 €1,057.99
The XLP22-8040 is an RO (reverse osmosis) membrane designed for the efficient removal of impurities, salts, and harmful substances from water. It operates at low pressure, reducing energy consumption and operating costs.
With a high filtration capacity, it is ideal for industrial and commercial water treatment systems. The membrane ensures stable water quality, has a long lifespan, and requires minimal maintenance.
How Reverse Osmosis Works
- Pre-treatment: The water first undergoes pre-treatment to remove large particles, chlorine, and other contaminants that can damage the RO membrane. This can include sediment filters, activated carbon filters, and softeners.
- High pressure: The water is pumped under high pressure through the RO membrane. The high pressure is necessary to overcome the natural osmotic pressure and force the water molecules through the membrane, leaving the impurities behind.
- Membrane: The RO membrane is semi-permeable, meaning it allows water molecules to pass through but blocks most dissolved salts, bacteria, viruses, and other impurities.
- Waste: The retained impurities and concentrated brine are discharged as wastewater.
- Post-treatment: The clean water may then undergo further treatments, such as UV sterilization or pH adjustment, before being stored or used.
Applications of Reverse Osmosis Water Purification Systems
- Drinking water production: Systems are used to produce clean drinking water from seawater, brackish water, or groundwater, especially in areas with limited freshwater resources.
- Industrial processes: Many industries, such as food production, pharmaceutical production, and electronics manufacturing, require high-quality pure water in their processes.
- Aquariums and aquaculture: Pure water is essential for maintaining a healthy environment for fish and other aquatic organisms.
- Laboratories: Research and testing laboratories use RO systems to produce ultra-pure water, which is necessary for accurate experiments and analyses.
Advantages of Reverse Osmosis
- High efficiency: RO systems can remove up to 99% of dissolved salts and impurities.
- Health safety: By removing bacteria, viruses, and chemicals, RO systems produce very safe drinking water.
- Flexibility: Can be used to treat various types of water, including seawater and contaminated groundwater.
Reverse osmosis is a reliable technology for producing clean water and is used in many critical applications worldwide.



































