Last Updated On December 2nd, 2019

Getting more water into your daily routine is a great thing. Countless medical and scientific professionals are continually sharing the benefits of drinking plenty of water. However, if you want to get the most out of your cold water consumption, you need to make sure that whatever you’re drinking is as clean and transparent as possible. That means investing in the best under sink water filter system the UK has to offer.

Many people don’t realise this, but tap water contains a lot of different things – including dirt, chemicals, and other impurities. If it’s not adequately filtered, the water you drink can damage your health, impact the taste of your cold water, and even make it harder to maintain a healthy lifestyle. Fortunately, it’s easier than you’d think to invest in safer tap water for you and your family.

A kitchen water filter that you can implement underneath the sink works behind the scenes to purify the tap water that you drink. We’ve been through a number of under sink water filter system reviews in the UK that we could find, to bring you this list of the top choices for your home.

Our Favourite Under Sink Water Filters Compared

Editor's Choice
iSpring RCC7AK 6-Stage Under-Sink Reverse Osmosis Drinking Water Filtration System with Alkaline Remineralization Filter - 75 GPD
Best Value
Under Sink Drinking Water Filter System - 3 Year filter life, High Capacity
Budget Choice
FINERFILTERS built-in filter, deluxe drinking water filter, under-sink installation, simple twist-fit filter dry change, modern water tap
Best Maximum Performance
iSpring RCC1UP-AK 7-Stage Maximum Performance Under-Sink Reverse Osmosis Drinking Water Filtration System with Booster Pump, Alkaline Remineralization Filter and UV Sterilizer
iSpring RCC7AK
WFM
Finerfilters FF-293
iSpring RCC1UP-AK
Number of Filtration Stages
6
Multiple
-
7
Special Features
Alkaline Remineralization filter
7-litre per minute flow, 3-year filter life
Dry change simple twist fit filter
Booster pump, Alkaline remineralisation, UV sterilizer
Reverse Osmosis Filtration
Warranty
One year
None
None
None
Editor's Choice
iSpring RCC7AK 6-Stage Under-Sink Reverse Osmosis Drinking Water Filtration System with Alkaline Remineralization Filter - 75 GPD
iSpring RCC7AK
Number of Filtration Stages
6
Special Features
Alkaline Remineralization filter
Reverse Osmosis Filtration
Warranty
One year
Best Value
Under Sink Drinking Water Filter System - 3 Year filter life, High Capacity
WFM
Number of Filtration Stages
Multiple
Special Features
7-litre per minute flow, 3-year filter life
Reverse Osmosis Filtration
Warranty
None
Budget Choice
FINERFILTERS built-in filter, deluxe drinking water filter, under-sink installation, simple twist-fit filter dry change, modern water tap
Finerfilters FF-293
Number of Filtration Stages
-
Special Features
Dry change simple twist fit filter
Reverse Osmosis Filtration
Warranty
None
Best Maximum Performance
iSpring RCC1UP-AK 7-Stage Maximum Performance Under-Sink Reverse Osmosis Drinking Water Filtration System with Booster Pump, Alkaline Remineralization Filter and UV Sterilizer
iSpring RCC1UP-AK
Number of Filtration Stages
7
Special Features
Booster pump, Alkaline remineralisation, UV sterilizer
Reverse Osmosis Filtration
Warranty
None

Best Under Sink Water Filter Reviews – Top 9 Picks

1. iSpring RCC7AK (Editor’s Choice)

iSpring RCC7AKThis high-capacity reverse osmosis filtering system from iSpring is one of the most impressive under sink water filters in the industry today. Designed to soften tap water and remove up to 99% of contaminants in your water system, the iSpring under-sink water filter is perfect for those who want to rest assured that they’re always getting the highest quality of drinking water out of their home taps.

Features

If your water pressure is under 45 PSI, you will need a slightly different kit, so keep that in mind when you’re considering this 6-stage under counter water filter. However, if the product is suitable for you, then it’s filtration systems are great for banishing dangerous substances from your water supply while maintaining healthy minerals and a balanced PH.

It’s a bit of a nuisance to install this under-sink filter if you don’t have any experience dealing with plumbing. However, on the plus side, the iSpring comes with a 1-year guarantee to help you get the most out of your investment.

Pros:
  • Reverse osmosis water sifter and water softener
  • Removes up to 99% of more than 1000 contaminants
  • Maintains healthy minerals in the tap water
  • Excellent quality premium components
  • Do-it-yourself installation
Cons:
  • Quite challenging to install for beginners
  • Not appropriate for people with less than 45 PSI water pressure
  • May need to invest in additional fittings

2. WFM Under Sink System (Best Value)

Under Sink Drinking Water Filter SystemIf you’re looking for an affordable water filter that delivers incredible results, it’s hard to go wrong with this under sink drinking water system from WFM. The perfect solution for people who want access to clean and crystal-clear drinking water in minutes – this WFM kit comes with filters that last up to 3 years at a time.

Features

This under-sink water filter has the capacity to sift high-level compounds from your tap water with ease. Hence, it improves odour and the water tastes even better. Additionally, the WFM water filter is fantastic at removing heavy metals – thanks to KDF filtration. With this high-quality long-life water filtering system, you’ll be able to access multiple levels of filtration to help you get the most out of your experience with your drinking water at home. There’s even an impressive flow rate of up to 7 litres per minute – perfect for filling pans and kettles.

As with many sink water filters, this kit can be a little difficult to install at first, and some parts appear to be more vulnerable to breaking during transit. Make sure you check that everything is in one piece when you receive your package.

Pros:
  • Complete system with all fittings and sink filters
  • Filter usability lasts for up to 3 years
  • Excellent at filtering high-level chlorine and heavy metals
  • High flow rate of up to 7 litres per minute
Cons:
  • Difficult to install without prior expertise
  • Some parts are prone to breaking in transit
  • Some reviewers complained of missing parts

3. Finerfilters FF-293 (Budget Choice)

FINERFILTERS built-in filterImproving the quality of your water supply doesn’t have to mean spending a fortune. This Finerfilters kit is excellent for those who want to discover all the benefits of removing contaminants from their tap water – without breaking their budget.

Features

The Deluxe under-sink water filter kit comes with a chrome tap and replacement filters that you can change every six months.

Finerfilters claims that their solution is very easy to install – thanks to a simple twist fit – which means that you can have delicious and crystal-clear water in no time. However, there doesn’t seem to be any instruction included, which might make the process more confusing for some.

You might need a little help from a professional plumber to get this new drinking water filtration device into place safely underneath your kitchen sink.

Pros:
  • Deluxe chrome tap included
  • Dry change simple twist installation
  • Budget-friendly price
  • Amazing value for crystal-clear tap water
Cons:
  • Complicated to install
  • Instructions not included
  • Filters must be changed every six months

4. iSpring RCC1UP-AK  7- Stage (Best in Maximum Performance)

iSpring RCC1UP-AK 7-StageIf you can’t afford to compromise on the performance of your water purifying system or you’re worried about the possibility of leftover contaminants in your drinking water, this iSpring filter kit could be perfect for you. Designed to give you the absolute highest quality of filtration on the market with unmatched efficiency, speed, and drain ratio – the iSpring under-sink water filter has it all.

Features

The device can filter through more than 1,000 water pollutants including fluoride and chlorine to give you healthier and excellent tasting water in seconds. Additionally, the filtering membrane is rated at an incredible capacity level of 100 gallons per day. The iSpring filter can even improve the pH of your water with an Alkaline remineralisation filter included.

Once again, the biggest issue with this under-sink water filter is the complexity of installing it – you’ll probably need the help of a plumber. Additionally, it can be difficult to find filter replacements when you need them.

Pros:
  • Excellent speed, efficiency, and drain ratio
  • Booster pump operates at almost silent levels
  • Filters over 1000 tap water pollutants
  • 100 gallons per day capacity rating
  • Alkaline remineralisation filter included
Cons:
  • Difficult to install without expertise
  • May need to stock up on filter replacement
  • Can create a lot of wastewater

5. Water2Buy Swan Neck Filter Kit

Water2BuyIf you’ve been struggling to get the most out of your drinking water until now, then you could change your life with the Water2Buy under-sink water filter. This incredible water tap purifying solution is easy to install and brimming with features to help you get rid of unwanted germs. You’ll be able to save time and money over using a standard pitcher or jug with a filter inside.

Features

As well as promising a simple installation, the Water2Buy team also stand by the quality and longevity of their filters with an impressive 3-year parts warranty and 30-day money-back guarantee. This means that even if nothing happens to your drinking water filter to disrupt its performance, you can send it back within 30 days if you’re not happy.

However, keep in mind that the parts aren’t well organized when you receive your filter cartridge package. Consequently, you’ll need to be careful when opening your kit to make sure you don’t lose anything.

Pros:
  • Great filtration process at a budget-friendly price
  • Excellent for easy installation
  • 3-year parts warranty
  • 30-day money-back guarantee
  • Healthier filtered water in no time
Cons:
  • Instructions aren’t very useful
  • No clues as to which way round the sink water filter should go
  • Can lose parts very easily when opening

6. Undersink Drinking Water Tap Filter Kit

Undersink Filter Kit SystemWhen it comes to buying the best under sink water filter the UK has to offer, it’s essential to make sure that you’re investing in a kit that has everything you need. This may include a new filter tap for your kitchen sink, or extra parts and accessories just in case.

Features

The Undersink drink water tap filter kit from Finest Filters comes with a range of fittings to suit your needs, including a T33 inline carbon filter with accessories, and mounting clips.

Once you’ve installed this water filter system, you’ll be able to rely on high-quality carbon filtering whenever you use your taps. That means you’ll consistently remove organic contaminants, odours, and other unwanted substances including chlorine from your filtered water.

One issue is that some of the parts can be easily damaged during transit. Therefore, it’s essential to check that all of your parts and filter cartridge components are in good condition when your package arrives.

Pros:
  • High-quality carbon filter system
  • Simple and straightforward
  • Price is very budget-friendly
  • Comes with all necessary accessories
  • Faucet included
Cons:
  • Parts can break in transit
  • You might need extra help with the instructions

7. iSpring RRC7 Filtration System

iSpring RCC7 5-Stage filtrationA reverse Osmosis kitchen water filter – like this one from iSpring – will help to enhance water quality for tastier, and healthier drinking. The 5-stage sifting system not only removes up to 99% of over 1000 different contaminants, but it can also soften your water, too. This iSpring kit is ideal for anyone in search of safe, nice tasting, and clean water whenever they turn on their faucet.

Features

If you’re looking for incredible quality, you can also rest assured that you’re going to get the excellent standard of filters in your iSpring kit. It has been ranked with certified “gold” components by the Water Quality Association. The system also comes with a stunning brushed nickel all-metal faucet too.

Similar to other under-sink filters, this kit isn’t for novices. Therefore, you’ll need to make sure you have some help from a plumber to get the filter cartridge installed. Additionally, it might not work as well with all kinds of water, so make sure you have the right water system before you buy.

Pros:
  • Reverse osmosis for safer and healthier filtered water
  • Gold standard components
  • Removes over 1,000 contaminants
  • Maintains minerals in filtered water
  • Faucet included
Cons:
  • Not intended for people with low water pressure
  • Challenging to install without professional help
  • Some fittings may be American

8. Finerfilters AQ-USINK-KIT-1PK

Finer FiltersSometimes, when you’re reading through kitchen sink water filtration system reviews in the UK, you’re not looking for filters that are designed to last a lifetime. Instead, you may want a kit that you can regularly replace, which means that you can upgrade to better systems depending on your budget. The Finerfilters under sink drinking water filtration kit is a simple solution for those temporary filtering requirements.

Features

This under-sink water sifting system removes all the organic contaminants, odours, and other substances including chlorine – that you don’t want in your cold water. However, it’s designed to last for 6 months. Thus, you can either buy a replacement system twice a year or upgrade as necessary.

However, it’s not as robust and effective as some of the higher-priced filters on the market. Nonetheless, this kit is great for someone who’s just getting started with the under-sink sifting system.

Pros:
  • 6-month replacements
  • High-quality filtered water on tap
  • Excellent faucet included
  • Great carbon filter performance
Cons:
  • Daunting installation process
  • Not as good at purifying as some other high-quality filters

9. BACOENG 5-Stage Ultra Filtration System

BACOENG 5 Stage Ultra-FiltrationIf you’re looking for something extra impressive to transform your kitchen water filter experience, then you can’t go wrong with this 5-stage filtering solution from BACOENG. Designed to provide delicious filtered water in seconds, this under sink water system has the capacity to give the purity you want, without getting rid of healthy minerals.

Features

The UF system removes the smaller particles, including harmful micro-organisms. Furthermore, it also keeps some of the most essential dissolved minerals in your purified water. The BACOENG patented high-strength UF membrane removes up to 99% of dangerous contaminants with excellent sifting precision that’s ideal for removing chlorine, heavy metals, and more.

This under sink water filter comes with a stainless steel faucet. However, like many of the filters mentioned here, it can be challenging to install if you’re not a professional. Moreover, the instructions for the filter cartridge aren’t very helpful at all.

Pros:
  • 5-stage filtration process for clean water
  • UF filter included
  • Excellent at keeping crucial minerals
  • Food-grade stainless steel faucet included
Cons:
  • Complicated to install
  • Difficult to follow instructions

Which Under Counter Water Filter is Right for You?

water filter system under a sinkA sink water filter is an excellent way for homeowners to improve the quality of their water instantly and effectively. Whether you’re using a reverse osmosis system or a tool that offers “ultra-filtration,” you can rest assured that you’ll end up with healthier, more delicious purified water.

The key to success is knowing exactly what you need from your filtering system before you begin shopping around. There are many different water filters on the market today. Here’s what you should look for when making the most of your water sifting investment.

1. Water Pressure

When it comes to choosing the perfect water filter, it’s important to consider water pressure. The last thing you want is to spend forever waiting for your glass of cold water to fill. Make sure that when you’re looking at various filtration systems, you search for a filter that can offer quality water pressure alongside excellent straining process.

2. Filtering Capacity

A water filtration system should be able to remove as many dangerous containments from your drinking water as possible while leaving healthy minerals behind. Most of the high quality water filters on the market today can sift thousands of potential contaminants at once. Look for the under sink water filter that can offer the highest quality of results that you need.

3. Ease of Installation

Most of the ideal under the sink filters on the market today will require a plumber for expert installation. However, there are some solutions out there that you may be able to manage to install by yourself. Even if you can’t fix the water filtration, it should be easy enough to replace the filters when the time comes to replace the old one.

4. Cartridge Longevity

Speaking of changing your filters, if you don’t like the idea of changing your cartridge too often, then you might want to search for a water cleansing system that lasts years at a time, rather than just a few months between changes.

Finding the right sink water filter can significantly improve the quality of your water, but there’s no one-size-fits-all solution.

Choosing Your New Water Filter

a young lady filling a glass of water in the tapWhen chosen with care and consideration, the best under sink water filter in the UK can give you healthier, nice tasting water every day. What’s more, it means that you don’t have to waste time and money on external water filtration jugs tools. However, it’s essential to think carefully about what you need before you make your investment. Reading through under sink water filter system reviews from UK customers can help, but don’t forget to consider your personal needs, too.

Our favourite option on the market today is the iSpring RCC7AK 6-stage water filtering kit. This high-capacity solution comes with reverse osmosis purifying process to increase the quality of your water and remove up to 99% of contaminants. Although it doesn’t work with low-pressure water, it’s excellent at delivering a great water pressure, fantastic PH, and amazing taste for up to 3 years between filter changes.

Have you tried one of the listed sink water filters above? Tell us about your experience and share it in the comments below.

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