Compact Reverse Osmosis for High-Quality Drinking Water
A compact under-sink reverse osmosis system with integrated storage, four-stage filtration and mineral balancing for everyday drinking and cooking.
- Up to 99.9% protection against bacteria and viruses
- Approx. 190 litres per day membrane capacity
- Integrated 5-litre water-on-water storage tank
- K7M post-filter adds magnesium and calcium
Why the RO-101S Works Well in Everyday Kitchens
Bacteria & Virus Protection
Reverse osmosis provides a highly effective physical barrier against microbiological contaminants.
RO Membrane Capacity
The RO-50S membrane is rated at approximately 50 GPD for household drinking-water use.
Integrated Storage
The built-in water-on-water tank avoids the bulky external vessel used by many traditional RO systems.
Mineral Balancing
The final conditioning stage adds magnesium and calcium to improve the taste of purified water.
RO Purification Without a Bulky External Storage Tank
The RO-101S combines the membrane and storage system within one compact cabinet. That makes it easier to fit beneath the sink while keeping the filtration system neat and accessible.
Its water-on-water accumulator also allows the system to operate from mains pressure without a separate electric booster pump in suitable installations.
Broad Protection Against Common Tap-Water Impurities
High-Level Filtration, Hidden Neatly Under the Sink
The RO-101S gives you dedicated purified drinking water without taking over the kitchen. Its compact all-in-one format keeps the filtration stages and storage system together beneath the worktop, leaving the kitchen itself clean and uncluttered.
Once installed, purified water is available directly from the dedicated drinking-water tap — ideal for everyday drinking, cooking, tea and coffee.
- Compact under-sink installation
- No bulky conventional external storage tank
- Purified water available directly at the sink
- Helps reduce reliance on bottled drinking water
Each Cartridge Has a Clear Job
K5 Pre-Filter
Reduces sediment, rust and larger suspended particles before finer filtration.
K2 Sorption Filter
Targets chlorine, organic compounds and finer impurities before the RO membrane.
RO-50S Membrane
Performs the main reverse osmosis stage, reducing dissolved salts and contaminants.
K7M Conditioning Filter
Polishes the water and adds magnesium and calcium for a more balanced taste.
Cleaner Water for Drinking, Cooking and Hot Drinks
By removing hardness minerals and dissolved impurities, the RO-101S is particularly useful for drinking water, tea, coffee, cooking and appliances that suffer from limescale.
What You Get
- Compact RO-101S filtration system
- Integrated storage reservoir
- K5, K2, RO-50S and K7M filtration stages
- Dedicated filtered-water tap connection
Keep the RO-101S Performing at Its Best
Sediment pre-filtration cartridge.
Fine sorption and pre-filtration cartridge.
Core 50 GPD reverse osmosis membrane.
Final conditioning and mineralisation cartridge.
Not sure which cartridge you need? Use the Aquaphor filter identification guide →
Aquaphor RO-101S Specifications
| System Type | Compact under-sink reverse osmosis system |
|---|---|
| RO Membrane | Aquaphor RO-50S reverse osmosis membrane |
| Bacteria & Virus Protection | Up to 99.9% |
| Remineralisation | Yes — magnesium and calcium via K7M |
| Storage | Integrated 5-litre water-on-water tank |
| Nominal Membrane Capacity | 50 GPD / approximately 190 litres per day |
| Minimum Operating Pressure | 2.0 bar |
| Maximum Operating Pressure | 6.3 bar |
| Dimensions | 371 × 420 × 190mm |
| Replacement Cartridges | K5, K2, RO-50S and K7M |
| Electrical Power | Not required in suitable mains-pressure installations |
Official Aquaphor RO-101S Technical Manual
View the manufacturer documentation for installation, plumbing connections, cartridge replacement, commissioning and maintenance.
Aquaphor RO-101S FAQs
Does the RO-101S remove limescale?
Yes. Reverse osmosis removes dissolved calcium and magnesium hardness minerals, helping prevent limescale in kettles, coffee machines and other small appliances.
What contaminants does the RO-101S reduce?
The multi-stage system reduces chlorine, hardness minerals, heavy metals, nitrates, nitrites, microplastics, PFAS and a broad range of dissolved contaminants.
Does reverse osmosis remove beneficial minerals?
The RO membrane removes dissolved minerals along with other dissolved contaminants. The K7M conditioning stage then adds magnesium and calcium to the purified water.
Which membrane does the RO-101S use?
The system uses the Aquaphor RO-50S reverse osmosis membrane.
Does the RO-101S need electricity?
No electric booster pump is required where incoming mains pressure is suitable for the system.
Need Help Choosing the Right RO System?
Our technical team can help you check cupboard space, mains pressure, replacement filters and compatibility before you order.
Contact Support Team