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Reverse Osmosis System

Usual price £245
On Sale £197 - all incl (No hidden extras).

You Save £48 (Only 4 Left at this Price)

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  • 1 x High Quality Reverse Osmosis Water Filter
  • Get Beautiful Tasting, Incredibly High Quality Filtered Water On Tap 24/7 
  • Kit Includes Everything You Need
  • Easy Self-Installation Under Sink - No Plumber Required
  • Free Help and Support
  • No Quibble 90 Day Money Back Guarantee if not Totally Satisfied - for any reason
  • Plus 3 Year Full Parts Warranty
  • See more product details and Testimonials

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Availability: In stock


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Three Great Reasons to Buy From Us

ONE: We're well established
- we've been trading for over ten years.
So we won't be disappearing. Your Money Back Guarantees and Warrantys will be safe.

TWO: Join thousands of happy customers - Many of our clients have been buying filters from us for several years. They keep coming back because we offer a friendly, helpful service and great value prices.

THREE: We're trustworthy: we have a huge number of great testimonials. For example see our reviews on the Approved Consumer Code Directory for the

Product Details

Reverse Osmosis Water Filters UK

Reverse Osmosis is a highly efficient way of purifying water.

If you want to remove a wide range of problem contaminants from your drinking water - like pesticides, bacteria, microplastics, microfibres, heavy metals, fluoride and other pollutants - Reverse Osmosis is probably your easiest and best solution.

Plus you get great tasting, healthy water!

Nothing but praise, kept in touch from the first step and when we had a slight delay I was promptly informed as to the problem, all fitted the same day too!!! I look forward to using you again in the future. Dave G

See a Table of the problem contaminants removed by Reverse Osmosis

The filter goes under your kitchen sink. You get a stylish extra tap on your counter top which you use when you want to drink beautifully purified drinking water.

As you may already know, Reverse Osmosis filters are usually expensive. You can easily pay £400 plus.

However, even though our filters are of a higher quality than many on the market, we are offering them to you here at a Special Offer price of £245 - See Today's Special Offer at the top of the screen.

Why so cheap?

Well for a start some people are simply overcharging. They are using the classic trick that "if it's expensive it must be good".

Yes, Reverse Osmosis is good. But it doesn't need to be that expensive.

Plus we only sell on the internet. Unlike other retailers, we don't have to pay for expensive shop rents and rates. And we don't add unnecessary "stages" to our RO systems.

Read More

Pros and Cons of Reverse Osmosis

Important Note about Acidic water

Installing The System

Replacing The Filters

How Reverse Osmosis works

What are Reverse Osmosis Stages?

List of Contaminants Removed by Reverse Osmosis

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Pros and Cons of Reverse Osmosis

RO filtration gives you very high quality water. It removes just about every contaminant you can think of.

They are more expensive than a standard water filter.

Is it overkill?

To be honest British tap water is usually good quality. Many people simply want to remove basic contaminants like chlorine in order to get "mineral water" quality for a fraction of the price of bottled water.

Many dangerous contaminants, like bacteria, are taken out by the water treatment plants.

However, other contaminants can get left in the water which RO will remove and a standard water filter won't.

The main reason for choosing an RO unit would be if you wanted to remove a specific contaminant, for example because of an allergy or other medical condition.

Otherwise, if you are simply looking for a good quality water filter, you might be best opting for one of our "Master Purifier" undersink systems.

This is because the initial purchase and ongoing cartridge renewal costs are much lower than an RO.

(For example, at the time of writing, the RO is onsale for £197 vs the Master Purifier at £67.

The replacement filters for the RO are £34 every six months vs around £13 for the Master Purifier).

If you do want an RO, please note that we sell very high quality ones at about half the price of many other suppliers.

Be wary about cheaper products though. While ROs do remove nearly all micro-organisms, cheaply made and/or deteriorating parts can greatly increase the risk of contamination through tiny leaks within the system.

The Issue of Waste Water

As part of the Reverse Osmosis filtering process about 70% of the water is rejected / wasted.

While this is only lost from your drinking and cooking water - i.e. not all the water you use in your home - in these times of water meters and general environmental awareness, this may be off-putting.

The "waste / rejected water" is automatically sent down the drain. However, you could recycle it e.g. for garden watering.

Important Note about Acidic water

One of the side effects of filtering water with Reverse Osmosis is that it can make the water more acidic.

It is now the opinion of an increasing number of experts that people in the "developed world" have excess acid "acidosis" and that this is behind many health problems.

In the natural health and alternative medicine communities, acidosis is considered to be an underlying cause of many degenerative diseases.

(Interesting fact: Dr. Otto Warburg won the Nobel Prize in 1931 for his research into the causes of cancer. He claimed it was caused by a lack of cellular oxygenation resulting from acidosis in the body).

In the Far East - where Reverse Osmosis filtration is very common - they use re-mineralisers / re-alkalisers on their RO units as standard.

Unfortunately, this is not the case with the great majority of Reverse Osmosis suppliers in the UK and because of this our Eastern friends think, frankly, that we are crazy.

(We only found out about this issue by chance, at a trade fair, during a casual conversation with a Far-Eastern manufacturer. None of our British suppliers had ever mentioned it).

Since then we now supply remineralising units as standard with all our Reverse Osmosis systems. It may lower our profit margin but we prefer to sleep soundly at night!

The remineraliser / realkaliser makes the filtered water more alkaline as well as reducing acidity in our bodies.

It is also thought to be better at flushing out toxins and waste matter whilst restoring the electrolyte balance.

Plus it adds calcium and other trace elements back into the water.

Please note: If you don't want the remineralising filter that's fine. Simply ask us.


How Much Does it Reduce the Acidity?

This depends on how acidic your source water is. But our re-alkaliser will have a significant effect.

You can expect your pH level to rise to at least 8 or more (pH 7 is neutral. Anything higher is alkaline).

Installing The System

Everything you need is in the pack.

It's very easy to install. No plumber is necessary.

You might prefer to use a plumber. But this should be a simple, one hour job for them at most.

(If you're going to hire someone else to do it, use a handyman - they'll be cheaper than a plumber).

Otherwise, it is all designed to be done by a householder. Full instructions are included. It should take 20 or 30 minutes. You will need a normal electric drill. That's all.

And we've got friendly (and free) customer support available.

Replacing The Filters

Like all water filters, you will need to replace the filters on the system periodically to ensure maximum performance.

You need to change four of the filters every 6 months. We send you a reminder. The current cost for the full replacement kit is £34.

Replacing these is very easy and will take a few minutes at most

Every 3 years or so you will need to change the membrane.

The current cost of a new membrane is £79.

All the required filters are included when you purchase the RO system.

Please note: This sale is for a limited number of units. So Get One Now and Save!

Read about how Reverse Osmosis works

For full performance details of our RO units please click here.

Supplied complete with all fittings and ready for immediate installation - including tap.

Features summary:

  • Everything you need to install the system is supplied
  • Simple installation no plumber needed
  • Full instructions included
  • Easy to use
  • Reliable operation
  • Free Technical Helpline to assist with any problems
  • No Quibble ONE YEAR Money Back Guarantee
  • Buy with complete confidence
  • Three year full parts warranty
  • Easy to use
  • Compact design
  • Failsafe flow restrictor
  • Auto shut-off/on full tank
  • State-of-the-art TFC membrane
  • Plus 4 top quality cartridges
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 Day or Night 24/7 for NEXT DAY DELIVERY

With FREE Delivery

Immediate Dispatch

Purchase with Total Confidence

Money Back Guarantee

If you don't like what you get, send it back for a full no quibble refund.

If for any reason you decide to return your purchase we promise you a no questions asked TWELVE MONTH Money Back Guarantee. Click here to read the "large print" about our Money Back Guarantee.

Please order now to secure today's sale price.

Technical information

RO Unit

Capacity / Production Rate - Gallons Per Day (GPD) 50 Gals

Feed Water Pressure 3 bar min to 6 bar max

Feed temp (Degrees C) 4 to 29


RO unit 42cm High x 34cm Wide x 14cm Depth

12L Tank / Storage vessel is 42cm High x 28cm diameter (Note: The storage vessel can be placed several yards from the RO unit. Simply ask us for extra tubing).

12 Litre Storage Vessel (Freestanding, connected to RO unit by tube, can be placed several yards away)

The unit should be fed by a water supply that is potable i.e. drinkable.

Please note that Reverse Osmosis is a complex process requiring reliable equipment performing under high pressures. Always know where your water main stopcock is located in the unlikely event of leaks The Unit Must NOT BE FROZEN.

The Unit is NOT designed to filter HOT water. It should only filter water at ambient temperature. (Feed temp = 4 to 29 degrees C).

However please note that our Reverse Osmosis units are often used to supply filtered water to hot/boiling water taps and other systems where the temperature is changed. That is fine. But the system itself will not filter hot water.

The filter system doesn't have to be at a level below the tap and neither does the tank as long as it's not a gravity fed system.


Water Pressure

The unit is designed to operate between 40 psi (3 bar) to 80 psi (6 bar) (psi = pounds per square inch). Please note that the only problem you are likely to encounter with operating a Reverse Osmosis unit in your home is if the water pressure is not high enough.

The vast majority of UK homes have water pressure that is higher than the required 40 psi.

If you have low water pressure it is easy and relatively cheap to install a pump. Ask us more about this if necessary.


How To Check Your Water Pressure

The simplest thing to do is to turn your cold water tap in the kitchen on full. Stand a few feet away. If you are being splashed with at least a few droplets then your pressure should be high enough.

If this is not happening you should call your local water supplier. They should be able to tell you what your water pressure is and whether it is likely to drop below 40 psi at any time.



Local water pressure can change - for example as a result of local road works etc. If the unit stops producing as much water as before check if your pressure has changed before calling us. Thank you.


How Much Water Does it Produce?

This model will produce 50 GPD ie it's "production rate" is 50 gallons per day.

(This assumes perfect conditions ie clean water at the right temperature and that incoming pressure is good).

But when considering how much water is produced by any Reverse Osmosis filter, the most important factor is the size of your RO tank.

This is because your system feeds the tank then stops when it's full.

Here's how it works:
When you draw water from your RO you are taking water from the tank. As the tank empties the system refills it at the "production rate" (ie 50 GPD) up to the tank's capacity.

Now, in addition to this, you have to consider that the tank's size is based on the actual physical dimension and not the amount of water it contains.

You have to also take into account the internal bladder that holds the water inside of the tank.

For example, the bladder inside this unit's nominal 12 litre tank will actually hold between 5 to 9 litres of water. If you draw all the water out of the tank it will take anywhere from half an hour to 4 hours to fill up again - depending on incoming water pressure.

Therefore the amount of water this size produces is 5 to 9 litres per average of 2 hours - on a stop/start basis. (Note that you only have to wait for more water if you fully drain the tank in one go. In our experience this happens very rarely with normal domestic usage).

Other typical tank sizes and the actual water they hold are:

18L nominal tank size: Holds 12 to 15 Litres

40L nominal tank size: Holds 23 to 28 Litres


Customer Reviews / Testimonials

installed easily - Review by Kerri
It arrived with no problems and installed easily. The water tastes great.

My main reason for buying the RO filter was to remove nitrates from the tap water for my aquariums. My tap water is over 40ppm and the RO water from the filter is 0ppm- fantastic! This means I can slowly reduce the nitrates in my aquariums by using 25% RO water in my weekly water changes.

The pH is good too, tap water is 7, and RO water is 7.2.
Experience has been amazing ! - Review by Rachel
My overall experience has been amazing ! My RO water filter arrived really quick. Ed was a dream in helping me with any queries. I can’t recommend this company highly enough. I absolutely love my filter. Thank you ????
Wonderful company to deal with - Review by Shadi
We have been a customer for quite a few years, excellent service and customer care, particularly like a reminder when the filter is due and easy to use a link to purchase again. This is the most friendly company we have ever come across.
Very affordable - Review by Dave C
I am extremely pleased with this Reverse Osmosis unit. It was easy to install and you can really taste the difference in the water. Unfortunately, it makes it virtually impossible to drink regular tap water as you can smell the chlorine once you are used to Reverse Osmosis.

I've just replaced our first set of filters which was extremely easy.

I wouldn't hesite to recommend this unit.
Great Service - Review by Steve - Grantham
UK Water Filters have always offered a great service with excellent after sales service. This is a great product which we have used for many years now. It pays for itself over and over
Fantastic service - Review by Trish
We have had our filter 8 plus years. A friend stayed with us for 10 days and this was his 'gift' when he left. It's been the best water filter ever !! I taste water at work and ugh !! The water from our reverse osmosis is incredible. We have replaced filters etc and the service is amazing. I just can't fault this company. We had a drippy problem recently and Jon has been more than helpful in helping us locate and solve the problem. Thank you Jon and to everyone else we have ever dealt with at UK waterfilters. It's a pleasure ordering from you :)
very good product - Review by Giovanni
I have been client for 4 years, very good product and great customer services.

This review was also placed on MyLocalServices the independent review site.

See more great reviews on us at
Excellent product - Review by Sue B
We have had our reverse osmosis water filter for 6 months. our water tastes great, much improved. The filter was easily fitted. I like that we get a reminder when we need to buy a new filter. Very glad we bought it.
all very good the system works well the water delish - Review by rumbletummy
a good and helpful company
the system is excellent and of very good quality
the water tastes just like my childhood home well water
which was of the best quality in fact I used to fill bottles of it to take away, rather like the way I collect mountain water in France
All good!
excellent aftercare - Review by Sabine Dembkowski
Delivery was prompt and the really provided for an excellent after care service! I would buy again here.
Really good service - Review by Steve in Grantham
Really helpful company, the filters have been made even more easier to put together, and great after sales service, I recommend them
very impressed - Review by Kevin
Just a short belated note to thank you and your team for the service they provided.
My wife had breast cancer and the reverse osmosis filter was the perfect model to filter out various impurities especially oestrogen.
I had a few problems fitting but your team advised me very well and it's all up and running - being a sceptical individual even I was surprised at the difference!
My brother in law who is an environmental engineer was so impressed he was going to order the same machine.
Thanks again to your team.
well pleased - Review by pete
having read so many horror stories about what tap water contains, decided on this product after much research, and glad I did, very pleased and can taste the difference...
Fantastic! - Review by Annalie
We've had this water filtration system set up for about a month now, and we couldn't be happier! We personally had a plumber fit it for us, as we didn't consider ourselves handy enough. He did mention as he was putting everything together it was pretty complicated and it took him a good 2 1/2 hrs. While we did have a problem with a leak (potentially just due some faulty threads on the end of one of the filters) we were immediately sent a new one after a quick phone call to the lovely people at Uk Water Filters, no qualms, no hassle and completely free of charge! We sent back the fautly filter (after leaving it to dry out for a few days) and now, everything works seamlessly as it should with no leaks to be seen! Could not be happier with our filter and the incredible customer service. Will be definitely be recommending this website to anyone who asks about filtration systems! :)

Thank you so much,
Take Care,
Great! - Review by DiscoBilly
The system is quite straight forward to fit and the water tastes sooo good.
Really good service
enjoying fresher tasting water - Review by Rob
Everything is completely fine set up was fairly simple and me and my family are enjoying fresher tasting water. Maybe an updated Instruction video could be handy for people setting it up but apart from that so is brilliant...grrat customer service too.
I wish there were more businesses like yours. - Review by Barbara Cole
It's 10 years now since I had cancer and the reverse osmosis filter is one of the things that has kept me well. I have to say that it has really made me happy the way you deal with people. Gives me hope there could be a better world. Cheers Barbara Cole
Delighted - Review by Sara
Hubby fitted it quite easily. Water tastes great and it was much cheaper than others we looked at
not great - Review by Martin
expected next day delivery, so i took the day off work and courier lost the item. Not impressed and certainly was not taking another day off work, so i canceled my order
excellent - Review by Elliott
arrived very promptly as promised, it is now fitted and as you say this is very easy to do.Thank's for the excellent service, I will be in touch when I need to replace the filters
more than satisfied with this - Review by Appun
I just want to say that I am more than satisfied with this. It was very easy to order and the delivery was very prompt.So thank you again very much!
Great service - Review by Julia
THANKS Water Filter arrived safe the next day and was fitted with no problems.Great service!
very happy - Review by Bird
received the water filters thanks and am very happy with them as i have been with all the other filters i have received from you
Thank you - Review by Dennis
Just a quick note to let you know how pleased I am with the quality of your product. I almost bought one from another website but baulked at the price and decided to look on-line again. I am glad I did as I saved almost £100. The filter is now fitted and works perfectly.

Super service - Review by Steve
The filter system arrived in perfect condition and is now in use. Many thanks for a super service. Kind Regards,
Very good service - Review by Mick
The reverse osomsis water filter arrived well packaged and has been installed with no difficulty. We are very pleased with it
Very quick delivery - Review by Mrs D Watson
Thank you for the excellent service. The new filter is fitted and working very well. It arrived the day after it was ordered which is very quick Thank you once again
Great service - Review by Pat
It arrived almost by return. Many thanks for your advice on the phone. I have recommended you to my friend
Very positive indeed - Review by PM
This product arrived very quickly after order. Installation was carried out by me. I had some issues with connecting to the Brita tap I had bought but the company quickly helped and sent the required connectors. I am very pleased with the installation and the filtered water it produces.
don't know why I never bought one earlier - Review by Andrew
I received the water filter only a few days after I ordered it I was impressed by how quickly it arrived actually, I installed it last Saturday and we've been enjoying it all week, I myself have been drinking Evian for the last year it's just a relief not having to go the shop for water all the time and this way my whole family can benefit from using it now I just don't know why I never bought one earlier

Very happy - Review by MaggieCG
I am very happy with the reverse osmosis water filter. I live in Scotland and in general our water is very good and plentiful but living in a semi rural situation we had no choice but to change from a private water supply to a private mains supply several years ago. I immediately used a filter jug to change the taste of the mains water but still found the water dirty on occasions. Recently I decided to look more into a more pure supply and after researching the subject decided on this system. Very simple to install although we decided to use our plumber as we needed some extension piping and a pressure reducing valve fitted. All done and dusted within two hours by the professional.
Great product and company - Review by Richard
I fitted my system at the weekend very simple apart from drilling the Granite work top (30 Mins drilling). The company seems very good and has offered to remind me each year about changing the fillers.
Another Happy customer.
Thank You
Thank you - Review by Mrs Ashworth
I am very pleased with my purchase. The service was very good and the filter works very well.
Very happy so far with my purchase and impressed with all online communication from the company. - Review by Maggie
After much research I decided to purchase a reverse osmosis unit from Uk Water Filters and have found the product very easy to install and excellent service if any problems - really do know what they are talking about. They even send out reminders to change the filters, all good after-sales service. Very pleased and great to have fresh tasting water once again.
Never had better water - Review by Steve
Did hours of research....the water filtration game can be complicated to say the least.Decided on an Reverse Osmosis system.From the first glass we have not had better tasting water in our lives.Very very glad we chose this method to deal with the contaminants in the water.
First Class Support. - Review by Salvatore Buonucci
We ordered the RO last year,we had a minor problem with one of the connections-the team at UK Water Filters sorted it immediately.I continue to buy the replacement filters from them and find the filters and the
service to be first-class.
Reverse Osmosis-peace of mind. - Review by Mr Khan
I spent 20 minutes on the phone asking questions about the unit before buying.The staff member was called Jon,he was very patient and knowledgeable .He said it was the most "robust"way to filter the water-he was right! I am very pleased with my purchase.I bought the system for peace of mind and i have it.Thank you.
Nothing but praise - Review by Dave
Nothing but praise, kept in touch from the first step and when we had a slight delay I was promptly informed as to the problem, all fitted the same day too!!!

I look forward to using you again in the future
Dave G


Shipped Immediately

With FREE Delivery

No hidden extras

Purchase with Total Confidence

Three Year Warranty

Plus your

Money Back Guarantee

If you don't like what you get, send it back for a full no quibble refund.

If for any reason you decide to return your purchase we promise you a no questions asked THREE MONTH Money Back Guarantee. Click here to read the "large print" about our Money Back Guarantee

We'll even pay your return postage

Please order now to secure today's sale price