RO Membranes &  Filters

Reverse Osmosis is the most efficient way to purify your drinking water. If you want to remove a range of contaminants from your everyday water, Reverse Osmosis filters can prevent things like bacteria, pesticides, microplastics, microfibers, fluoride and metals (amongst others) from polluting your water supply. It is, without question, the easiest and best solution to enjoy great-tasting, healthy water.

As a well-respected supplier of water filtration products here at Direct Water Filters, we have created a range of Reverse Osmosis water filtration systems that offer the ultimate in water purification. Easy to install, our products will offer you the peace the mind that you can enjoy your water supply without any undue worries about its ongoing quality – the same, high-quality maintained on a constant basis.

What Are Reverse Osmosis Filters/How Do They Work?



Reverse osmosis is a method of purifying water by pushing it through a semi-permeable membrane. The membrane allows pure water molecules through it, whilst impurities are flushed away. By using Reverse Osmosis filters, it is possible to remove all suspended solids, up to 98% of dissolved solids and virtually all bacteria, pesticides and viruses.

At the heart of any reverse osmosis system is the membrane; water is forced under pressure through the membrane to a storage tank and the waste by-product goes to drain. In addition to the membrane reverse osmosis unit also incorporates pre-filters and post-filters. Reverse osmosis systems are compact enough to be installed under most kitchen sinks.

However, the units do require a minimum water pressure of 2.7 bar/40psi - so you must have your home's water pressure assessed before purchasing the unit. Small pumps, specially designed with reverse osmosis systems in mind, are available if your water pressure requires boosting.

Why Choose A Reverse Osmosis System?

Better-tasting water.

Without chemicals in your drinking water, it will naturally taste better – Reverse Osmosis water is usually found to be far purer than water that has come directly from the tap. Fresh water is far more refreshing and satisfying.

No Contaminants.

As Reverse Osmosis filters are primarily used to remove particles and other impurities from water, no contaminants will emanate your water supply. A number of parasites will also be filtered from the water, providing protection against illness – if your water suffers from any type of harmful contaminants, a Reverse Osmosis system will be ideal to purify the water.

Low-Energy Usage.

The amount of energy used by Reverse Osmosis will be relatively low when compared to other water filtration systems. This ensures a productive, economic system that is ideal if you need to use as little energy as possible.

Saves Space and Is Expandable.

Depending on where you’d like to place it, procuring a Reverse Osmosis system can help to save space (when compared to other filters) and can easily to be expanded to cater for a larger volume of water.

Easy-to-Maintain.

Requiring maintenance twice-a-year, Reverse Osmosis water filters are easy to take care of – the filter is straightforward to remove and replace, making the job less complex and time-consuming.

Different Purification Levels.

There are 7 different stages of Reverse Osmosis, with each one getting increasingly more intensive. You can select how many stages you want and customise your choice to suit your needs. As an example of how they work – the first stage will remove particles like dust and silt. The next stage will be a carbon filter that removes bad tastes, caused by chlorine and other chemicals. The water will continue to be pushed through the filter to remove the remaining impurities – water freshness, alkalisation and UV filters (that kill bacteria and viruses) being key contributors.

Money-Saving.

Aside from contributing to lower-energy usage, Reverse Osmosis filters can help you to save money simply by cutting out the need to purchase bottled water in your quest for a healthier drink. All you’ll need is a reusable bottle and fill it up as and when – helping to cut down on the number of plastics you use/have to recycle too.

So, if you would like to…

  • Improve the taste, odour, and appearance of your water
  • Have no more limescale in your kettle or coffee machine
  • Improve the taste and texture of vegetables, soup, and sauces
  • Have an unlimited supply of pure water

…why not take a look around our range of Reverse Osmosis water filters and accessories? Each of the items here have been selected for their high-performance qualities and ease-of-installation – able to be fitted by any newcomer or veteran of water filters.

Need To Learn More About Our Water Filtration Systems? Get In Touch!

Feel free to continue to browse our selection of Reverse Osmosis filters and accessories – if you have any questions, our expert team are on hand to help. Give them a call today on 01604 947 839 or send an e-mail to sales@directwaterfilters.co.uk and they’ll get in touch as soon as possible.


Post Carbon Filter Cartridge Inline Water Filters

Post Carbon Filter Cartridge

AICRO inline water filter contain Coconut Shell Granular Activated Carbon and is idea..

£9.95

Water Remineraliser for Reverse Osmosis systems Inline Water Filters

Water Remineraliser for Reverse Osmosis systems

2'' x 10" in-line mineralizing cartridge.Used in the process of reverse osmosis filtration. Availabl..

£10.95

4 Stage Reverse Osmosis Filter Pack RO Membranes &  Filters

4 Stage Reverse Osmosis Filter Pack

Suitable for most standard  Reverse Osmosis Water Filter systems our 4 Stage Reverse Osmosis Re..

£16.80

Alkaline Filter Cartridge for Post RO systems

Alkaline Filter Cartridge

The ceramic balls emit far infar-red to ionize and activate water molecules.Installed in reverse osm..

£14.40

BiO+ H2AAA Alkaline Filter Cartridge

BiO+ H2AAA Alkaline Filter Cartridge

Hydrogen-rich, Antioxidant, Alkaline Filter Cartridge This cartridge is encased in an in-line h..

£45.00

DI Resin Reverse Osmosis Pre & Post filter Pack

DI Reverse Osmosis Filter Pack

Suitable for vitality  Reverse Osmosis Water Filter systems our  Reverse Osmosis Replaceme..

£25.00

Reverse Osmosis Pre Filter Pack RO Membranes &  Filters

Reverse Osmosis Pre Filter Pack

Suitable for most standard  Reverse Osmosis Water Filter Systems Reverse Osmosis Replacement Fi..

£18.00

Vitality Reverse Osmosis Filter Pack RO Membranes &  Filters

Vitality Reverse Osmosis Filter Pack

Suitable for vitality  Reverse Osmosis Water Filter systems our  Reverse Osmosis Replaceme..

£35.95

5 Stage Reverse Osmosis Filter Pack RO Membranes &  Filters

5 Stage Reverse Osmosis Filter Pack

Suitable for most standard  Reverse Osmosis Water Filter systems 5 Stage Reverse Osmosis Replac..

£24.95

6 Stage Reverse Osmosis Filter Pack  RO Membranes &  Filters

6 Stage Reverse Osmosis Filter Pack

Suitable for most standard  Reverse Osmosis Water Filter systems 6 Stage Reverse Osmosis R..

£38.95

75GPD  TLC RO Membrane RO Membranes &  Filters TLC-100 Direct Water Filters

75GPD 1812 RO Membrane

75GPD Reverse Osmosis Membrane 1812 - 75GPD These R.O. membranes are available in flow rates up..

£16.80

100 GPD  TLC RO Membrane RO Membranes &  Filters TLC-100 Direct Water Filters

100GPD 1812 RO Membrane

100 GPD Reverse Osmosis Membrane 1812 - 100GPD These R.O. membranes are available in flow rates..

£19.20

200 GPD  TLC RO Membrane RO Membranes &  Filters

200 GPD 1812 RO Membrane

200 GPD Reverse Osmosis Membrane 1812 - 200GPD These R.O. TFC (thin film composite) membranes a..

£25.00

3012 RO Membrane Housing for Reverse Osmosis  RO Membranes &  Filters

3012 RO Membrane Housing for Reverse Osmosis

3012 RO Membrane Housing for 400, 600,500, 800GPD Reverse Osmosis membranes of the same size 3012..

£18.00

3013 RO Membrane Housing for 400 GPD Reverse Osmosis  RO Membranes &  Filters

3013 RO Membrane Housing for 400 GPD Reverse Osmosis

3013 RO Membrane Housing for 400 GPD Reverse Osmosis ..

£24.00

3113 RO Membrane Housing for Reverse Osmosis

3113 RO Membrane Housing for Reverse Osmosis

3113 RO Membrane Housing for Reverse Osmosis ..

£24.00

3213 RO Membrane Housing for 800 GPD Reverse Osmosis  RO Membranes &  Filters

3213 RO Membrane Housing for 800 GPD Reverse Osmosis

3213 RO Membrane Housing for 800 GPD Reverse Osmosis ..

£22.00

400 GPD Reverse Osmosis RO Membrane for 3012 Housing RO Membranes &  Filters

400 GPD Reverse Osmosis RO Membrane for 3012 Housing

400 GPD Reverse Osmosis Membrane ULP3012 - 400GPD These R.O. TFC (thin film composite) membrane..

£55.00

400 GPD Reverse Osmosis RO Membrane for 3013 Housing RO Membranes &  Filters

400 GPD Reverse Osmosis RO Membrane for 3013 Housing

400 GPD Reverse Osmosis Membrane TFC 3013 - 400GPD These R.O. TFC (thin film composite) membran..

£55.00

4021 Stainless Steel Reverse Osmosis Membrane Housing

4021 Stainless Steel Reverse Osmosis Membrane Housing

4″ x 21″ RO stainless membrane housing are specifically designed for the production of pure water fo..

£94.99

4040 Extra Low Pressure RO Membrane for 4"x 40" Reverse Osmosis Membrane Housing  RO Membranes &  Filters

4040 Extra Low Pressure RO Membrane for 4"x 40" Reverse Osmosis Membrane Housing

Extra Low-pressure use 4″ x 40″ RO Membranes are specifically designed for the production of pure wa..

£170.00

4040 FRP Reverse Osmosis Membrane Housing   RO Membranes &  Filters

4040 FRP Reverse Osmosis Membrane Housing

4″ x 40″ RO FRP fibreglass membrane housing are specifically designed for the production of pure wat..

£120.00

4040 Stainless Steel Reverse Osmosis Membrane Housing  RO Membranes &  Filters

4040 Stainless Steel Reverse Osmosis Membrane Housing

4″ x 40″ RO stainless membrane housing are specifically designed for the production of pure water fo..

£99.49

600 GPD Reverse Osmosis RO Membrane for 3012 Housing RO Membranes &  Filters

600 GPD Reverse Osmosis RO Membrane for 3012 Housing

600 GPD Reverse Osmosis Membrane  3012 size - 600GPD These R.O. TFC (thin film composite) ..

£75.00

800 GPD 3113 RO Membrane

800 GPD 3113 RO Membrane

800 GPD Reverse Osmosis Membrane to fit 3113 membrane housingIdeal for brackish water, if you live b..

£79.00

800 GPD Reverse Osmosis RO Membrane for 3012 Housing RO Membranes &  Filters

800 GPD Reverse Osmosis RO Membrane for 3012 Housing

800 GPD Reverse Osmosis Membrane TFC 3012 - 800GPD These R.O. TFC (thin film composite) membran..

£75.00

600 GPD Reverse Osmosis RO Membrane for 3013 Housing RO Membranes &  Filters

800 GPD Reverse Osmosis RO Membrane for 3013 Housing

800 GPD Reverse Osmosis Membrane TFC 3013 - 800GPD These R.O. TFC (thin film composite) membran..

£69.95

800 GPD Reverse Osmosis RO Membrane for 3213 Housing RO Membranes &  Filters TLC-800 Direct Water Filters

800 GPD Reverse Osmosis RO Membrane for 3213 Housing

800 GPD Reverse Osmosis Membrane TFC 3213 - 800GPD These R.O. TFC (thin film composite) membran..

£79.50

1812/2012 RO Membrane Housing & Wrench RO Membranes &  Filters

Membrane Housing 1812/2012

1812/2012 RO Membrane Housing¼" Quick Connect Fitting Fits Standard Tubing Used on Most RO Systemsco..

£12.95

 DI Mixed Bed Resin Filter Cartridge RO Membranes &  Filters

DI Mixed Bed Resin Filter Cartridge

Virgin Mixed Bed Di Resin for Window Cleaning/ aquariums/ Car ValetingRefillable cartridge..

£15.00

1000 GPD Reverse Osmosis RO Membrane for 3313 Housing RO Membranes &  Filters

1000 GPD Reverse Osmosis RO Membrane for 3313 Housing

1000 GPD size 3313 RO MembraneThese R.O. TFC (thin film composite) membranes are available in flow r..

£129.95

DI Mixed Bed Resin Inline Filter Cartridge  Aquatics

DI Mixed Bed Resin Inline Filter Cartridge (2.5x10")

Inline filter housing withVirgin Mixed Bed Di Resin for Window Cleaning/aquariums/car ValetingDi-RO ..

£18.65

DI Mixed Bed Resin Inline Filter Cartridge  Aquatics

DI Mixed Bed Resin Inline Filter Cartridge (2x10")

Inline filter housing withVirgin Mixed Bed Di Resin for Window Cleaning/aquariums/car ValetingDi-RO ..

£17.45

Empty Refillable Cartridge Shell RO Membranes &  Filters

Empty Refillable Cartridge Shell

Empty Refillable Cartridge Shell to be used for filling own media.*PLEASE NOTE COLOUR AND STYLE MAY ..

£6.00

MB-115 Mixed Bed Deionisation Resin

MB-115 Mixed Bed Deionisation Resin 25l

25 liters MB-115 Mixed Bed Deionisation ResinOur resin is broadly used within both household and com..

£12.00

DI Mixed Bed Resin Vessel Aquatics

Mixed Bed Resin Vessel

Vessel tank available empty or with DI Resin or other media, please ask.All sizes come supplied with..

£55.00

3 Pack 1 Micron Melt-blown Polypropylene Sediment Filter RO Membranes &  Filters

3 Pack 1 Micron Melt-blown Polypropylene Sediment Filter

The construction of this pure polypropylene, surfactant-free depth filter ensures low pressure drops..

£12.00

3 Pack 5 Micron Melt-blown Polypropylene Sediment Filter RO Membranes &  Filters

3 Pack 5 Micron Melt-blown Polypropylene Sediment Filter

The construction of this pure polypropylene, surfactant-free depth filter ensures low pressure drops..

£12.00

Carbon Block Filter For Reverse Osmosis Systems x3 Reverse Osmosis FiltersCTO-BL-3Direct Water Filters

Carbon Block Filter For Reverse Osmosis Systems x3

These replacement carbon block water Filter cartridges, will Fit All Standard 2.5 x 10 Inch Filter H..

£13.95

Carbon Wrap Chlorine & Particle Filter Cartridge

Carbon Wrap Chlorine & Particle Filter Cartridge

Carbon wrap cartridges are specially developed dual function filter that acts as both a sediment rem..

£49.95

PURA 100 GPD RO Membrane

PURA RO Membrane

PURA 100 GPD Reverse Osmosis MembraneAll models are certified to NSF/ANSI 58 for the reduction of Ar..

£21.60

FRESCA Reverse Osmosis RO Membrane

FRESCA Reverse Osmosis RO Membrane

3313 RO MembraneRO Membrane Size: 38 x 12These R.O. TFC (thin film composite) membranes are availabl..

£94.99

PURA Post Carbon Filter Cartridge

PURA Post Carbon Filter Cartridge

Nano silver composite filterPost carbon water filter cartridge for the PURA RO system but will ..

£24.95

FRESCA Combination Filter and Membrane Pack

FRESCA Combination Filter and Membrane Pack

Keep your FRESCA system in perfect condition with this filter and membrane packwe have done a combin..

£120.00

FRESCA RO Combination Filter Cartridge

FRESCA Combination Filter Cartridge

FRESCA RO Combination Filter Cartridge only 2 in 1 (Pleated PP + Block Carbon)54,000-liter capa..

£59.50

PURA RO Replacement Cartridge with PP and Activated Carbon Block Combo Filter

PURA RO Replacement Cartridge Pack

Replacement filter pack for the PURA RO system1x PURA-F-210 Combination Filter1x PURA..

£62.40

PURA RO Replacement Cartridge with PP and Activated Carbon Block Combo Filter

PURA RO Replacement Cartridge with PP and Activated Carbon Block Combo Filter

PURA RO Combination Filter Cartridge only 2 in 1 (Pleated PP + Block Carbon)Capacity18,000 Lite..

£29.50

Showing 1 to 47 of 47 (1 Pages)
Membranes, Filters, Reverse, Osmosis

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