Best Under Sink Water Filter Reviews UK 2021 – Top 10 Comparison

best under sink water filter uk

Our editors independently research the best products online to produce this list. We may receive commission on purchases made from the links below but this will never affect our product choices.


Top 3 Best Under Sink Water Filters

  1. Waterdrop Reverse Osmosis (Editor’s Choice)
  2. iSpring RCC7AK (Best 6-Stage)
  3. Finest Filters Drinking Kit (Best Value)

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 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.

Best Under Sink Water Filter Reviews – Top 10 Picks

Waterdrop Reverse Osmosis (Editor’s Choice)

The Waterdrop Reverse Osmosis Water Filtration System is a great product that boasts good features. If you want a filter that is easy to install and effectively removes contamination, this is a solid option.

This water filtration system does not require an additional tank. Also, it should have a quick installation. The intelligent design can be set up and installed in a few minutes. The unit itself is made from BPA-free and lead-free materials and has a total weight of 14.1kg. In terms of size, it has dimensions of 45.9 x 14.4 x 45.1cm. As a result, it should comfortably fit under most sinks.

For filtration, this device offers a 90% TDS reduction and has a filtration accuracy of 0.0001um. This means that it will effectively remove contaminants if you live in an area with poorer quality water.

The system also has its own internal pump. Therefore, it offers a decent water flow of up to 400 GPD. This should be enough for the water demands of a whole family. A downside is that the pressure could sometimes drop, and the indicator light may eventually stop working.

Pros:

  • Uses advanced osmosis technology to achieve an accuracy of 0.0001um
  • Can effectively remove most contaminations from your tap water
  • Easy to install in just a few minutes and changed with a single turn
  • Also saves waste water usage by up to 300%
  • No-tank design helps eliminate secondary water pollution

Cons:

  • You may find occasionally that the purifying works less effectively
  • You could find that the pressure is sometimes lacking
  • The faucet light may eventually stop working

iSpring RCC7AK (Best 6-Stage)

This 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.

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 its 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

Finest Filters Drinking Kit (Best Value)

When 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.

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
  • Removes contaminants including chlorine
  • Comes with all necessary accessories
  • Faucet included

Cons:

  • Parts can break in transit
  • You might need extra help with the instructions

Frizzlife MK99 (Best Universal Fittings)

The Frizzlife MK99 Under Sink Water Filtration System has universal fittings that will work with multiple sink setups. It also offers a no-nonsense installation process that should take less than 3 minutes. When installed, it will give a good water flow, and clean-tasting water.

For effective water purification, this product has a two-stage filter. The advanced technology inside is capable of removing over 99.99% of pollution, including 58 contaminants that commonly thrive in water. At the same time, it will still leave the important minerals found in water, whilst reducing things like heavy metals, chlorine, and chromium 6.

Frizzlife also has a range of attachments including parts for a 3/8” and ½” cold water line. As a result, you should easily be able to install it. In terms of water flow, this filter can achieve rates of up to 2.0GMP. It also has a built-in shut off valve that will stop water from leaking when changing the filter.

This is a great item, but it could have a few small issues. For example, the threads for the connectors may not always align properly. Also, the filter may be tricky to remove from its bracket to replace.

Pros:

  • Advanced two-stage purifying to effectively remove 99.99% of contaminants
  • Can work with both a 3/8” and ½” cold water line
  • Also comes with direct connection hoses and should fit standard water valves
  • Has a quick-twist installation system which should take less than three minutes
  • Can achieve a full water flow rate of up to 2.0GPM @60 PSI

Cons:

  • The threads on the connections may sometimes not align initially
  • It may be difficult to unclip the filter from its brackets
  • The filter may not be the easiest to change

iSpring RCC1UP-AK 7- Stage (Luxury Choice)

If 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.

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

Finer Filters AQ-USINK-KIT-1PK (Best Basic)

Sometimes, 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.

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

Water2Buy Swan Neck Kit (DIY Choice)

If 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.

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:

  • Excellent carbon filtration system
  • 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

iSpring RCC7 Filtration (Best 5-Stage System)

A 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.

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

FinerFilters FF-293 (Best with Chrome Tap)

Improving 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.

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
  • High quality materials
  • Amazing value for crystal-clear tap water

Cons:

  • Complicated to install
  • Instructions not included
  • Filters must be changed every six months

WFM High Capacity (Best for Heavy Metal)

If you’re looking for a reliable 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.

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

Which Under Counter Water Filter is Right for You?

A 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.

water-filter-system-under-a-sink

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.

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.

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.

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.

a-young-lady-filling-a-glass-of-water-in-the-tap

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

When 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 top pick is the Waterdrop Reverse Osmosis Water Filtration System. This product has an excellent combination of ease of use and effective filtration. You can enjoy great tasting water with virtually all contaminations removed, without too much hassle.

Additional Resources

1 thought on “Best Under Sink Water Filter Reviews UK 2021 – Top 10 Comparison”

  1. I am trying to find an under worktop filter system but key need is to produce alkaline water and to remove chlorine but the ones I am seeing reviewed aren’t listing the alkaline. Would you please suggest a system that is reasonably priced that converts water to alkaline.

    Thank you.

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