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Product Detail

Watts 4 Stage Reverse Osmosis (RO) Water Filter System


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The Watts 4 Stage Reverse Osmosis system is the Industry's best quality Reverse Osmosis System, with four separate filters designed to be the most effective combination providing top quality on demand, anytime from your home or workplace kitchen. This system will provide water you can count on at a mere fraction of the cost of bottled water, which is expensive, inconvenient and bad for our environment and prone to problems with bacteria. 


Those that have used Reverse Osmosis Systems in the past will know of Watts Water Technologies top quality. Internationally tested and certified by NSF, a system you can rely on, made in the USA to top manufacturing standards. The system is designed to remove chemical disinfectants, heavy metals, fluoride and any ingredients in water down to 1/10,000 microns. 


Filter replacements:Pre and post filters - Recommended change every six months for regular usage, or once a year in light usage. RO membrane change recommended based on periodic TDS rejection tests.Typical is every two years.We provide two separately sold pre and post filters replacement packs for both the 6-12 month pre-filter changes and the 2-3 year post-filter changes so the full system costs about £30 per year to maintain and we recommend you change the whole system every 5 years. You can buy the system with additional replacement filters for spares and save plus get a TDS Water Tester which will provide a general measure of water quality, very useful when checking when to replace your filters.


The system produces over 180 litres per day of pure water and comes complete with the 4-stage RO treatment unit, RO-PRO® plastic storage tank (9 width x 20 height inches) of 15 Litres/5 gallons (US) (NB A 15 litre/5 gallon metal tank is available, please contact us after your purchase if you would like this instead), 3/8 in. tube for better flow to low lead chrome faucet tap, John Guest® quick connect fittings, and all 4 filters, plus clear and easy to follow installation instructions. There will be a separate faucet tap for your filtered water fitted in addition to your existing kitchen sink taps.


Adding the Remineraliser and Alkaline Filter


We recommend adding the Ecopure Remineraliser and the Pure-Pro Alkaline Filter to your system. Adding the Pure-Pro Alkaline Filter with raise your water pH to between 8.5-9.5 by adding sodium, calcium, magnesium and potassium and lasts for 3000 litres. The Ecopure Remineraliser adds trace amounts of these minerals plus a range of rare earth minerals and lasts for 2 years.


Tap options


There are a range of single dispensing taps available. The system comes with an NSF certified tap as standard but you have the option to upgrade this to a swan neck single dispensing tap or if you want an all-in-one solution, you could have a 3 way tap which connects hot, cold and filtered water in single stylish solution.


Installation is easy


All you need is a drill, spanner and a screwdriver. Watch this short video demonstrating the system being installed.



We offer free next day UK Delivery for orders before 1PM and are £45 and over. You will receive a tracking ID from us when your goods are dispatched allowing you to track your package in real-time.

For or full delivery information including international shipping, please click here to view full delivery information.

Warranties and Guarantees

Any warranty or guarantee applied to goods sold at the behest of a third party shall be the responsibility of the said third party absolutely and any correspondence entered into must initially be carried out between the purchaser and the Company.

Goods sold as manufactured by or being the service of the Company shall be subject to such warranties and guarantees as may be stated by the Company and correspondence should be entered into with the Company in writing exclusively.

No warranty or guarantee shall be applied or implied other than at the time of purchase.

In any event all goods or services purchased here in shall be subject to an unconditional warranty for a period of 30 days, said warranty not to exceed the value of the purchase.


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