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About PureH2O Ltd

PureH2O Ltd are the only UK manufacturer of residential Reverse Osmosis (RO) systems. We pioneered the introduction of RO systems into UK homes 30 years ago and are proud to have launched our own exclusive PurityPRO™ range for the home in 2019.

PurityPRO™ water purifiers are the most advanced RO systems available today, manufactured in clean rooms and designed to deliver great benefits. PurityPRO™ purifiers use 50% less water, 95% less power and 70% less plastics than all other systems on the market. PurityPRO™ purifiers are world class products and represent the first significant development in RO system design for 30 years.

For the purest drinking water and unbeatable taste choose PurityPRO™.

The PureH2O Ltd team have been developing Reverse Osmosis for 50 years, helping water utilities, microelectronics plants, governments and even countries improve water quality. Singapore achieved water independence from Malaysia through the innovate Brackish Water RO system designed by Dr Terry Cummings in 1985.

“Our PurityPRO™ systems are unique. The first consumer RO system to use a 316 stainless steel storage system with HEPA filter and zero back pressure, the design enables the RO membrane to produce at the optimum differential pressure whether the tank is empty or full. It is the most efficient RO system in the world.”

Your choice of drinking water

Optimum health is directly influenced by the purity of your drinking water. Our PurityPRO™ systems produce the purest, freshest and best tasting water on the planet.

British tap water is regulated. However, contaminants once regulated as “maximum permissible levels” are now called “prescribed concentration levels”. These levels are regarded as safe for human consumption but common sense would tell us to avoid pollutants and drink pure water. Some pollutants such as the pesticide metaldehyde will always exceed the legal limits because no equipment exists to remove it on a municipal scale.

At PureH2O we believe that there are no acceptable levels of impurities for drinking water. Installing our PurityPRO™ drinking water system will be one of the best decisions you make. Not only for your family’s health, but also the taste alone makes a PurityPRO™ system one of the most enjoyable, worthwhile products you will own.

Reverse Osmosis (RO) systems typically waste high volumes of water during production. PurityPRO™ is the first system to address this and is the most water-efficient system on the market. We optimise the rejection rate of our RO membrane by eliminating the back pressure associated with conventional systems, whether RO from Chinese or RODI from American suppliers.

Automated flushing removes the scale that normally blocks a membrane, extending its life and maintaining production capacity for ten years.

We guarantee the purity of the water our systems make for you. Our PurityPRO™ systems deliver total purity at 7pH (neutral). Nitrates, pesticides, chloramines, volatile organic compounds, heavy metals, microplastics and microorganisms are removed in the most efficiently designed system on the market.

PureH2O Ltd is a truly British manufacturer.

Roger Wiltshire

Managing Director, PureH2O Ltd.

If I were to offer you three glasses of water, each from a different source and each with a list of the contaminants known to be present in the water, it would seem a natural choice to drink the purest of the three. That is, water with the least contaminants – after all why would anyone knowingly drink something if they knew it contained potentially harmful chemicals?

This is very much the choice we make each time we drink water. Some people drink tap water knowing that it contains chemicals (in 2012 the slug poison metaldehyde breached the legal limit by a factor of 100). Others will reach for bottled water but if you were to study the chemical analysis (legally required on the side of bottled water) you may be surprised to see contaminants such as nitrates that starve the red blood cell of oxygen. You may already have a water filter installed but if it’s inefficient (carbon doesn’t remove slug poison) would you still knowingly drink the water it produces?

It makes sense therefore when making a choice of water purifier to buy a system that is guaranteed to remove ALL contaminants in tap water – not just for a few weeks but for the life of the system. Carbon filters can improve taste but don’t really scratch the surface. Reverse Osmosis (RO) is the only way to remove organics and inorganics. However, conventional RO systems are beset by significant inefficiencies. Back pressure from pressurised storage tanks lead to impurities bleeding through the membrane.

Some manufacturers use De-Ionisation (DI) to overcome the inefficiencies of their RO design but in doing so created an ever-growing contribution to the disaster we all know as microplastics that pollute every ocean on the planet. This was one of the influencing factors that led us to start manufacturing a much better, more efficient premium RO system here in the UK.

The PurityPRO™ system eliminates the need for additional DI filtration because its process maintains the differential pressure across the membrane whether the tank is full or empty.

Roger Wiltshire, PureH2O Ltd


PureH2O Ltd manufactures, installs and maintains the world’s most innovative water purification systems and the most technologically advanced boiling, chilled and sparkling water taps. Since 1991 we have been committed to providing our domestic and commercial customers with the purest, safest, most sustainable choice of drinking water, which helps them reduce their environmental impact by avoiding single-use plastic bottled water.

+44 (0)1483 617000

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Unit 21 Boundary Business Centre Boundary Way, Woking, Surrey GU21 5DH. United Kingdom