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"Absolutely outstanding. The kit is superb, water tastes wonderful. Such lovely staff, always so helpful and easy to contact when you need advice. high quality service. 🤩 great work 🤩"
Kelly, June
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Product Description
Reverse Osmosis Water Filters UK
Reverse Osmosis: The most efficient, powerful way to purify your water
If you want to remove a wide range of problem contaminants from your drinking water - like pesticides, bacteria (ecoli, cryptosporidium etc), microplastics, microfibres, heavy metals, fluoride - and many other pollutants - Reverse Osmosis is, without question, your easiest and best solution.
Plus you get great tasting, healthy water!
Read on for full details, plus useful information and tips on what to watch out for when looking for an RO filter.
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! Rachel J.- verified buyer.
How the Filter Fits into Your Kitchen
The filter is designed to fit easily under a standard kitchen sink.
To serve your fresh, purified drinking water you can either get a stylish, small extra tap on your counter top, which you use when you want to drink. (This is supplied as standard with your kit).
Or you can get a "three way tap" - which gives you hot / cold and filtered water. (Here's the three way tap we can supply you with but the system can be used with any make of similar tap. Please ask us about the latest deal if you'd like to get your new RO unit with the 3 way tap).
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 £378 - See Today's Special Offer at the top of the screen.
Read on for further details...
Why are These Cheaper than Others on the Market?
Well for a start some people are simply overcharging. They are using the classic sales approach 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.
Pros: RO filtration gives you very high quality water. It removes just about every contaminant you can think of.
Cons: 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 from your water, for example fluoride or hormones or microplastics - among many others.
Or perhaps you would like an RO to help with 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 on sale for £287 vs the Master Purifier at £87.
The replacement filters for the RO are £39.95 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.
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. Steve
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.
One of the side effects of filtering water with Reverse Osmosis is that it can make the water more acidic.
In the natural health and alternative medicine communities, excess acid / "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 - re-alkalisers are fitted to RO units as standard, to prevent acidicity.
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 re-alkerising media as standard with all our Reverse Osmosis systems. It may lower our profit margin but we prefer to follow the "precautionary principle" and sleep soundly at night!
The re-alkaliser media makes the filtered water more alkaline.
It is also thought to result in water that's better at flushing out toxins and waste matter from the body whilst restoring the electrolyte balance.
Please note: If you don't want the re-alkerising media that's fine. Simply ask us to remove it.
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 6 or more (pH 7 is neutral. Anything higher is alkaline).
What About the Minerals?
A common claim about Reverse Osmosis is that the filtration method is so powerful that it strips the water of everything including essential minerals like calcium and magnesium.
While this usually tends to be put about by people who are selling alternatives to Reverse Osmosis - which are usually not as well proven and, funnily enough, often a lot more expensive - it is actually true.
But here's the thing: they often get the crucial detail wrong.
They usually assume the problem is that by not getting the minerals in your drinking water you're thereby becoming mineral deficient.
But that's not the actual problem.
The real problem is arguably worse than that. What happens is that de-mineralised water will aggressively seek to absorb new mineral molecules.
So when you drink RO - and other types of "de-ionised water" - it might be stripping away minerals from inside your body.
While demineralised water is common in nature - it's called rainwater and has been drunk by humans since, well, forever... - even before we started throwing things at each other - calcium and magnesium deficiency can lead to a range of health issues including pregnancy disorders, cardiovascular diseases and a higher rate of bone fractures.
But here’s a couple of reassuring facts:
Fact one: An easy solution to the issue is to simplyre-mineralise the RO purified water before using it.
That’s why we include high quality re-mineralising media along with the re-alkaliser media. Problem solved.
Fact two: In any case, a good varied diet with lots of fruit and vegetables should ensure you have more than enough minerals to cope with any risk of mineral deficiency. An apple a day will certainly pack your body with more than enough minerals to keep the doctor away.
But again, as above, if you don’t want the remineraliser / realkaliser filter simply let us know and we can exclude it from your kit.
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. Barbara C
How Hard is it to Install the Filter?
Everything you need is in the pack.
It's very easy to install. No plumber is necessary.
You might prefer to use a plumber. If so, this should be a simple, "one hour callout" job for them at most.
(If you're going to hire someone else to do it, we suggest you use a handyman - they'll probably be cheaper than a plumber - and just as good at what is a very straightforward job).
Otherwise, it is all designed to be done by a householder. Full instructions are included. It should only take you about an hour. You will need a normal electric drill. That's all.
And we've got friendly (and free) customer support available.
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... good after-sales service. Very pleased and great to have fresh tasting water once again. Maggie
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 cost for the full replacement kit is £39.95.
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 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!
Reverse Osmosis: The most efficient, powerful way to purify your water
If you want to remove a wide range of problem contaminants from your drinking water - like pesticides, bacteria (ecoli, cryptosporidium etc), microplastics, microfibres, heavy metals, fluoride - and many other pollutants - Reverse Osmosis is, without question, your easiest and best solution.
Plus you get great tasting, healthy water!
Read on for full details, plus useful information and tips on what to watch out for when looking for an RO filter.
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 Rachel J.
How the Filter Fits into Your Kitchen
The filter is designed to fit easily under a standard kitchen sink.
To serve your fresh, purified drinking water you can either get a stylish, small extra tap on your counter top, which you use when you want to drink. (This is supplied as standard with your kit).
Or you can get a "three way tap" - which gives you hot / cold and filtered water. (Here's the three way tap we can supply you with but the system can be used with any make of similar tap. Please ask us about the latest deal if you'd like to get your new RO unit with the 3 way tap).
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 £378 - See Today's Special Offer at the top of the screen.
Read on for further details...
Why are These Cheaper than Others on the Market?
Well for a start some people are simply overcharging. They are using the classic sales approach 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.
Pros: RO filtration gives you very high quality water. It removes just about every contaminant you can think of.
Cons: 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 from your water, for example fluoride or hormones or microplastics - among many others.
Or perhaps you would like an RO to help with 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 on sale for £287 vs the Master Purifier at £87.
The replacement filters for the RO are £39.95 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.
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. Steve
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.
One of the side effects of filtering water with Reverse Osmosis is that it can make the water more acidic.
In the natural health and alternative medicine communities, excess acid / "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 - re-alkalisers are fitted to RO units as standard, to prevent acidicity.
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 re-alkerising media as standard with all our Reverse Osmosis systems. It may lower our profit margin but we prefer to follow the "precautionary principle" and sleep soundly at night!
The re-alkaliser media makes the filtered water more alkaline.
It is also thought to result in water that's better at flushing out toxins and waste matter from the body whilst restoring the electrolyte balance.
Please note: If you don't want the re-alkerising media that's fine. Simply ask us to remove it.
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 6 or more (pH 7 is neutral. Anything higher is alkaline).
What About the Minerals?
A common claim about Reverse Osmosis is that the filtration method is so powerful that it strips the water of everything including essential minerals like calcium and magnesium.
While this usually tends to be put about by people who are selling alternatives to Reverse Osmosis - which are usually not as well proven and, funnily enough, often a lot more expensive - it is actually true.
But here's the thing: they often get the crucial detail wrong.
They usually assume the problem is that by not getting the minerals in your drinking water you're thereby becoming mineral deficient.
But that's not the actual problem.
The real problem is arguably worse than that. What happens is that de-mineralised water will aggressively seek to absorb new mineral molecules.
So when you drink RO - and other types of "de-ionised water" - it might be stripping away minerals from inside your body.
While demineralised water is common in nature - it's called rainwater and has been drunk by humans since, well, forever... - even before we started throwing things at each other - calcium and magnesium deficiency can lead to a range of health issues including pregnancy disorders, cardiovascular diseases and a higher rate of bone fractures.
But here’s a couple of reassuring facts:
Fact one: An easy solution to the issue is to simplyre-mineralise the RO purified water before using it.
That’s why we include high quality re-mineralising media along with the re-alkaliser media. Problem solved.
Fact two: In any case, a good varied diet with lots of fruit and vegetables should ensure you have more than enough minerals to cope with any risk of mineral deficiency. An apple a day will certainly pack your body with more than enough minerals to keep the doctor away.
But again, as above, if you don’t want the remineraliser / realkaliser filter simply let us know and we can exclude it from your kit.
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. Barbara C
How Hard is it to Install the Filter?
Everything you need is in the pack.
It's very easy to install. No plumber is necessary.
You might prefer to use a plumber. If so, this should be a simple, "one hour callout" job for them at most.
(If you're going to hire someone else to do it, we suggest you use a handyman - they'll probably be cheaper than a plumber - and just as good at what is a very straightforward job).
Otherwise, it is all designed to be done by a householder. Full instructions are included. It should only take you about an hour. You will need a normal electric drill. That's all.
And we've got friendly (and free) customer support available.
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... good after-sales service. Very pleased and great to have fresh tasting water once again. Maggie
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 cost for the full replacement kit is £39.95.
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 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!
... and our Money Back Guarantee should help reassure you that we are an honest firm who will give you a first class, long term service.
How to get help
Call our help line on 020 8761 6611 at any time during UK office hours ie 9 am to 6 pm
Or email us for a rapid response.
Our policy is always to get back to you within an hour - or one working day at most.
Returns
In addition to your 3 Year Warranty, if for any reason you change your mind about your purchase within 90 days of receiving the goods, you can return your product for a full and complete refund *
PLUS we will pay for your return postage(UK only)
*This applies to individuals/ consumers using the products in domestic settings. Businesses please see our terms and conditions
Delivery Times
Order before 3 pm on any working day and we guarantee your order will be sent out the same day (not on weekends)
(To be honest we often manage to send them even after 3pm. But we can't promise that).
All prices on the website include delivery charges and VAT except where stated otherwise.
Delivery Charges
Your Standard "Free Delivery Included" is Second Class
This usually takes between 3 to 5 working days ie does not count weekends or Bank Holidays
Pay Extra for First Class
You also have the option at checkout to pay extra for First Class.
This should result in next day working delivery to mainland UK.
BUT please note while 95% do arrive next day this is not guaranteed.
However arrival within two working days is almost certain.
You can see your delivery costs at the checkout stage before you buy.
We are a family run business who value our customers. We've been trading for over twenty five years. So we won't be "here today gone tomorrow". Your Money Back Guarantees and Warranties will be safe.
Fully Accredited
Members of Safebuy the leading Consumer Assurance Scheme for online retailers approved under the Trading Standards Institute's Consumer Codes Approval Scheme.
Repeat Customers
Many of our clients have been buying filters from us for several years. Over 95% keep coming back to renew their filter because we offer a friendly, helpful service and great value prices. Checkout our TrustPilot reviews.
We’re Trustworthy
We have a huge number of great independent testimonials. For example on the Approved Consumer Code Directory for the Trading Standards Institute and on Google Certified Shops.
Such an improvement over unfiltered water. Losing microplastics, scale, chlorine and all the other nasties that can work their way in is just a bit of piece of mind for me in relation to my kids.
– Nick Love
I've had the filter installed for 1 month now and the water tastes loads better and no more smell of chemicals, just clean fresh filtered water I'd say it's the best water I've ever had.
– Neil Bradfield
“My filter fits easy and I am happy. We weigh the old filter when it is removed, filled with gunge which never got into our bodies with this filter. It’s quite frightening. My filter is worth every penny!
– Kathleen Gibson
Such an improvement over unfiltered water. Losing microplastics, scale, chlorine and all the other nasties that can work their way in is just a bit of piece of mind for me in relation to my kids.
– Nick Love
I've had the filter installed for 1 month now and the water tastes loads better and no more smell of chemicals, just clean fresh filtered water I'd say it's the best water I've ever had.
– Neil Bradfield
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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! 
