Skip to content

AQUAPHOR RO-101S Compact Reverse Osmosis Water Filter - Under Sink Filtration System

£229.99

Notify me when back in stock

Fast, Free Shipping
vector of a customer support agent with headset on
friendly expert support
a vector of a smiling face with hands open
Advice Before & After Sale
manufacturers warranty

Aquaphor RO-101S Compact Reverse Osmosis Water Filter

The Aquaphor RO-101S is an exceptionally compact, under-sink reverse osmosis water filtration system engineered to deliver ultra-pure drinking water directly from your tap. Combining multi-stage mechanical purification with advanced reverse osmosis filtration and an internal water-on-water storage tank, the RO-101S addresses a wide range of common tap water impurities while operating completely without an electric booster pump. It is the perfect point-of-use solution for households seeking bottled-water purity and lasting appliance protection without sacrificing valuable under-cabinet space.

99.99% Protection

Removes chlorine, bacteria, viruses, microplastics, and heavy metals at a molecular level.

RO-50S Membrane

Employs a high-efficiency semi-permeable barrier to reject dissolved contaminants and salts.

Mineral Balancing

Intelligently enriches purified water with optimal magnesium and calcium levels for a crisp, natural taste.

Appliance Protection

Completely extracts hardness minerals to stop scale build-up inside kettles and coffee makers.

Why Choose the Aquaphor RO-101S?

The Aquaphor RO-101S is purpose-built for households that demand more thorough purification than standard carbon-only filters can provide. The core filtration phase relies on a semi-permeable RO-50S membrane, which strips out impurities regardless of your municipal feed quality. It provides a reliable barrier against common water contaminants, including toxic heavy metals, synthetic pesticides, nitrates, nitrites, chlorine compounds, and microplastics.

Unlike traditional reverse osmosis systems that depend on massive, bulky external storage vessels and high mains pressure, the RO-101S features a patented, space-saving integrated water-to-water accumulator. This innovative internal configuration enables the system to stay fully functional and highly efficient at mains water pressures as low as 2 bar, removing any need for noisy electric booster arrays or under-sink electrical wiring.

Everyday Benefits You Actually Notice

The improvements delivered by the RO-101S extend well beyond basic drinking water purification. By extracting the dissolved hardness salts responsible for stubborn limescale accumulation, it ensures that your small kitchen appliances—such as electric kettles, steam cookers, and high-end espresso stations—remain clear of scale build-up and require far less descaling maintenance over time.

Additionally, the post-filtration conditioning stage remineralizes the water supply with a calibrated dose of active magnesium. This process neutralizes the flat taste typically associated with reverse osmosis water, bringing out a smooth, balanced flavor that elevates the taste profile of everyday cooking, brewed teas, and gourmet coffees. For families aiming to replace single-use plastic bottles, the RO-101S provides a seamless, eco-friendly, and cost-effective alternative directly at the kitchen sink.

Compatible Replacement Filters & Media

Ensure consistent water purity and hygienic operation by swapping out your quick-change modules on time:

Frequently Asked Questions

Does the RO-101S remove limescale?

Yes. The physical reverse osmosis membrane filters out up to 99% of dissolved calcium and magnesium hardness salts. This entirely halts the chemical formation of stubborn limescale crusts inside your kettles, coffee makers, and steam appliances.

What contaminants does the RO-101S reduce?

The system uses a multi-stage process to filter out a broad array of impurities. This includes heavy metals (such as lead and copper), chemical chlorine, synthetic pesticides, agricultural nitrates, nitrites, microplastics, PFAS, and up to 99.99% of microbiological bacteria and viral strains.

Does reverse osmosis remove beneficial minerals?

While the core RO membrane purifies the water by removing all dissolved particles, the RO-101S includes an active post-filtration conditioning phase. This step re-introduces a calibrated blend of health-essential calcium and magnesium minerals back into the clean stream to restore a crisp flavor profile.

Which membrane does the RO-101S use?

The system is specifically engineered to operate with the authentic, twist-lock Aquaphor RO-50S reverse osmosis membrane cartridge.

Technical Specifications

System Metric Configuration Specification Details
System Classification Type Compact Under-Sink Reverse Osmosis Filtration Station
Core Membrane Module Aquaphor RO-50S Molecular Filtration Shield
Microbiological Purifying Ratio Up to 99.99% Continuous Bacterial & Viral Extraction
Post-Filtration Remineralisation Yes — Active Magnesium & Calcium Balancing Blend
Internal Storage Reservoir Vol 5-Liter Embedded Water-on-Water Storage Tank
Purified to Drainage Water Ratio Efficient 1:4 to 1:6 Operating Ratio
Nominal Membrane Capacity 50 GPD (Gallons Per Day Nominal Flow Output / ~190 Litres)
Minimum Operating Water Pressure 2.0 Bar (29.0 psi) — Functions smoothly without electrical power
Maximum Operating Water Pressure 6.3 Bar (91.4 psi) — Regulator required if mains exceed 6.3 Bar
Physical System Dimensions 371 mm (Length) × 420 mm (Height) × 190 mm (Width)
Approved Replacement Cartridges K5 (or K1), K2, K7M (or K7BM), and RO-50S Elements
Brand Origin Authority Aquaphor Water Filtration Technologies

Official Documentation & Assembly Guides

Aquaphor RO-101S Technical Product Manual & Passport

Complete manufacturer operational documentation, detailed plumbing connection grids, and technical criteria data sheets.

View Technical Manual (PDF)

Aquaphor Series Universal Installation Overview

General reference guide for under-sink base cabinet bracket layouts, drain line connection saddles, and flushing sequences.

View Assembly Guide