Our six stage RO system with booster pump provides up to 190 litres of purified water per day straight from your kitchen sink. It is compact and designed for UK homes, capable of removing over 98% of common contaminants through layered pre-filters, an RO membrane, and final polishing stages.
The booster pump ensures a steady flow even where mains pressure is low and the system comes complete with a chrome tap, storage tank, pre-fitted filters, and all fittings for quick installation.
This reverse osmosis system is suited for households wanting direct access to better quality water without relying on bottled alternatives.
Finerfilters supplies a wide choice of under sink reverse osmosis systems, each designed for domestic water treatment. The six stage RO system with booster pump stands out for its capacity and pressure support, guaranteeing performance even in homes with lower mains supply.
This system includes:
3-gallon pressurised storage tank holding 6.5 litres of filtered water.
Installation manual.
Chrome faucet tap.
All pre-filters, post-filters, pipes and fittings.
Booster pump with integrated high and low-pressure switches.
This model tackles limescale and impurities effectively. It is perfect for drinking water, cooking, and appliances like kettles or coffee machines.
By combining sediment removal, carbon filtration, a semi-permeable RO membrane, and polishing stages, it offers a complete purification process at an affordable price point.
Finerfilters 6 Stage Domestic Under Sink Reverse Osmosis System with Booster Pump
The 6 stages of filtration are;
Stage 1
A 5 micron sediment filter made of 100% pure Polypropylene fibres. Removes Dirt, Sand and Rust.
Stage 2
A granular activated carbon filter composed of high-performance activated carbon. Removes free Chlorine, Odour, Organic Contaminants, Pesticides and Chemicals.
Stage 3
A Carbon block filter - composed of high-performance Carbon. Removes Trihalomethanes, Pesticides and Volatile Organic Chemicals (VOCs).
Stage 4
A high rejection thin film composite 50 GPD Reverse Osmosis membrane with the capacity to produce up to 190L of purified water per day. This membrane removes contaminants present in water including, but not limited to, up to 99% of dissolved Salts, Lead, Copper, Barium, Bacterial By-Products, Oestrogen and Silica.
Stage 5
A Post-Carbon filter designed to improve taste. It removes any residual impurities and odours from the tank and provides finer conditioning of the purified water.
Stage 6
Remineralizing filter to enrich the water ions with health essential minerals including Calcium, Magnesium, Potassium and Sodium.
Plastic Water Storage Tank
Made of food-grade reinforced Polypropylene and contains a food-grade Butyl diaphragm/bladder which holds the water, ensuring tasteless, odourless & contaminant-free water. There is a small air charge between the outside of the bladder and the inside of the tank. It"™s this air pressure that pushes the water out of the tank when the tap is opened. The tank is pre-charged with air but will require topping up as part of the regular maintenance of your reverse osmosis system. Air can be added using a bicycle pump or similar.
Can be connected to additional tanks to increase the storage capacity of your Reverse Osmosis system.
Uses 1/4"Female x 1/4"Pushfit Angled Shut Off Valve.
Holds 6.5 litres of water.
Working Pressure: 50 PSI
Bottom Air Charge Pressure: 5-7 PSI
Dimensions: 36cm x 25cm x 25cm
System Measurements
6 Stage Reverse Osmosis System with Diaphragm Booster Pump Length: 45cm Width: 44cm Depth: 26cm Weight: 13.5kg
Important Information
Reverse Osmosis systems waste water to make water, this is normal and the same with all RO systems as this is the way the membrane rejects the impure water, which goes to drain, to produce the pure water. This process requires high water pressure as the 'permeate' water is being forced through microscopic holes in order to catch contaminants.
These systems require a minimum of 29 PSI / 2 Bar (Pumped RO Systems) or 45 PSI / 3 Bar (Unpumped RO Systems) to work. Ideal pressure depends upon incoming water temperature but around 60 PSI (4 BAR) is acceptable to produce pure water. We will always recommend purchasing an RO system with a booster pump pre-installed as this allows you to easily configure water pressure.
Membrane performance is dictated by several variables, most notably; incoming water TDS, pressure, and temperature. In order to achieve the 50GPD output stated the incoming water must match the test conditions which are; Concentration of Permeate (NaCl) = 250ppm, Water Pressure = 60 psi / 0.41MPa / 4.14 Bar, Temperature = 25°C
Because UK mains water is typically colder than test conditions we recommend that these systems are run at, or around, 80 - 90 PSI (5.5 - 6 bar). This allows the system to reduce the wastewater to pure water ratio and work quicker at producing pure water.
As many people won't have this mains pressure; pumped RO Systems or booster pumps can be purchased from us and added to the system which will increase the pressure output (a minimum of 29 PSI (2 bar) is required to operate the booster pump).
The membrane elements must be stored in a cool and dry place, away from direct sunlight. Do not expose to temperatures above 45°C
The membrane can last between 1 and 2 years depending on incoming water hardness. Filters must be replaced at least every six months for optimal performance.
List of contaminants that reverse osmosis removes
As Reverse Osmosis can remove over 1,000 contaminants, the list below is non-exhaustive and serves to highlight removal rates of only some of the most common contaminants found in drinking water.
Approximate percentage (%) of contaminants removed by Reverse Osmosis.
Aluminium
96 - 98%
Ammonium
80 - 90%
Bacteria
99+%
Boron
50 - 70%
Bromide
90 - 95%
Cadmium
93 - 97%
Calcium
93 - 98%
Chlorine
92 - 95%
Chloride
92 - 95%
Chromate
85 - 95%
Copper
96 - 98%
Cyandie
85 - 95%
Fluoride
95 - 98%
Graphene
80 - 90%
Hardness
93 - 97%
Iron
96 - 98%
Approximate percentage (%) of contaminants removed by Reverse Osmosis (Continued.)
Lead
95 - 98%
Magnesium
93 - 98%
Manganese
96 - 98%
Mercury
94 - 98%
Nickel
96 - 98%
Nitrate
97 - 99%
Polyfluoroalkyl (PFAs)
95%
Phosphate
95 - 98%
Potassium
92 - 96%
Silica
80 - 90%
Silicate
92 - 95%
Silver
93 - 96%
Sodium
92 - 98%
Sulphate
96 - 98%
Thiosulphate
96 - 98%
Zinc
96 - 98%
Trusted Water Filtration from Finerfilters
Finerfilters is part of the Aqua Cure Group and has supplied water filtration systems to UK households and businesses for over ten years. We are trusted by more than 25,000 customers a year, and we continue to deliver excellent value, with dependable systems and support.
You can enjoy free UK mainland delivery with every purchase, backed by knowledgeable aftercare and clear installation guides.
Our customer support team provides expert advice on choosing, installing, and maintaining your RO system. Browse our help centre or contact us for guidance.
Product instructions.pdf
