best under sink water filter uk

Best Under Sink Water Filters of 2022

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 10 Best Under Sink Water Filters

  1. iSpring RCC7P-AK (Editor’s Choice)
  2. iSpring RCC1UP-AK 100GPD (Luxury Choice)
  3. Waterdrop 15UA (Best Value)
  4. Frizzlife ‎MP99 (Best 2-Stage)
  5. Frizzlife PD600-TAM3 (Best With Smart LED Display)
  6. Frizzlife SK99 (Best Eco Friendly)
  7. HiKiNS RO-150G
  8. Finest-Filters Kit with Accessories
  9. Frizzlife SP99
  10. Geekpure 5-Stage

The quantity of under sink water filters available with all their different features makes finding the perfect one much harder than it needs to be. However, we are here to help. If you are searching for the best under sink water filter on the UK market, you have come to the right place.

In this article, we not only want to provide you with details of some of the top options for under sink water filters but also explain what you should be looking for before making your purchase.

There are a number of things to think about when buying an under-sink water filter, such as different filtration levels, capacities, displays, and filter cartridges.

By the end of this guide, we hope you find yourself in a better position and be ready to get the ideal under sink water filter for your home.

How We Compared Under Sink Water Filters

To find the right under sink water filters we considered multiple factors, including:

  • Effectiveness at filtering water
  • Ease of installation
  • Ease of replacing a filter
  • Durability

Our team researched a wide range of products, comparing their features against the points above and meticulously fact-checking customer reviews. The following list is the result of a careful selection of under sink water filters that would suit any kitchen enthusiast’s needs.

Discover more about our process here.

Under Sink Water Filter Reviews

iSpring RCC7P-AK (Editor’s Choice)

First up, we have this iSpring model, and this incorporates 6 stage reverse osmosis filters in this particular system. This means the model can remove up to 99% of items, such as heavy metals and other contaminants.

This system is so good that it only allows water molecules through, which means you get some really pure drinking water. But this model also comes with an alkaline remineralisation filter, so all those healthy molecules are then added back into the water.

But be aware that this model also comes with its own tap. However, that’s common with reverse osmosis systems, so you need to have that space available to take full advantage of this filtration system.

Also, this water filter comes with an electric pump. That helps boost water pressure, so the filter could partly correct this if you struggle in this area.

Installing this water filter is also pretty straightforward, even though it’s quite bulky in size. That applies even to installing replacement filters, which should be done every six months.


  • It removes pretty much every impurity in the water
  • You are given clear instructions for installation
  • The electric pump works well with boosting pressure
  • The alkaline remineralisation is a great idea
  • It produces quality drinking water


  • You do need space for an additional tap
  • This sink water filter does take up a lot of space

iSpring RCC1UP-AK 100GPD (Luxury Choice)

Next, we have another option from iSpring, but this model comes with seven different filtration levels. That does mean you have some amazing drinking water by the end, and it won’t even resemble your usual tap water.

Based on an RO system, it too comes with a booster pump for increasing water pressure to get better filtration. However, it comes with a UV filter stage, which comes on and goes off all on its own via a smart switch.

This model also comes with a brushed nickel tap, and installing the entire filter system is relatively quick and easy; the company is only a phone call away should you need some assistance. Capable of filtering a vast amount of water, the UV stage’s addition of this under sink filter transforms how this system produces quality filtered water for you to drink.

The only downside is that it may not be ideal if you have a small cupboard, as it takes up quite some space.


  • It provides seven levels of filtration
  • It boosts water pressure
  • The UV stage eliminates any bacteria
  • The company offers excellent support and advice for installation
  • The brushed nickel tap should be fine for most people


  • It takes up a lot of space below the sink
  • It does require an additional tap to function

Waterdrop 15UA (Best Value)

This under sink water filter by Waterdrop is the perfect example of how easy it can be to get the perfect drinking water. Some say it can take less than five minutes to install this sink water filter, but it’s worth the effort even if it takes you longer than this.

This model is actually attached directly to the cold water line. It then uses activated carbon to purify the water before it comes out of your cold water tap. Also, the good news is the water filter does not remove the healthy minerals, and if you are looking for a basic water filter that is very effective, then this could be perfect.

Be aware that the filter has a maximum lifespan of some 16,000 gallons of water. That means you will need to replace it, on average, every two years. That in itself is amazing as other filtration systems can often require more work on them than this option.

Overall, it may not remove as many things as an RO system, but these water filters will still perform exceptionally well when it comes to purifying your tap water.


  • It is very easy to install and can be done so in minutes
  • It has a huge lifespan considering the cost
  • It uses activated carbon, so is good at filtering out elements
  • It has a 3-stage filtration system
  • Heavy metals in your water will become a thing of the past


  • It may leave some minerals behind compared to other filtration options
  • It can feel slightly flimsy when attaching

Frizzlife ‎MP99 (Best 2-Stage)

If you want an under-sink filter that keeps things nice and simple, then this option by Frizzlife is one you should be looking at. Even though it only goes through 2 stages, it still manages to remove 99.9% of all contaminants, and that’s impressive.

This version also comes with its own dedicated tap, so you will need space to install this, which is not always required with other water filters. But here is an impressive part. The company insists that this under sink water filter takes only 10 minutes to install. If so, then it’s fast, and you can then do it.

Also, they state it comes with an auto-shut-off cap, so there is no need to turn the water off when installing. However, we would still recommend it for simplicity’s sake.

The best part about this under sink water filter is that it does not use too much space, and it appears very easy to install. That means anybody can transform their water in just a few minutes.


  • It appears easy to install
  • It removes almost everything even though it only uses 2 stages
  • It does not require a lot of space
  • It does come with a nice looking tap
  • You only need to replace the actual water filter every 6 to 8 months


  • The filters sometimes do not last as long as they state
  • It doesn’t filter as well as RO systems

Frizzlife PD600-TAM3 (Best With Smart LED Display)

If you love your technology, then this model by Frizzlife should appeal thanks to it coming with a smart LED display. The model also uses reverse osmosis to remove the absolute maximum level of impurities and contaminants on the market.

This model is also viewed as being very efficient, with there being no need to change the water filter on a regular basis. It also does not come with a tank, so this under sink water filter does take up next to no space.

It has a capacity of 600 gallons, and the smart LED actually tells you all about the lifespan of the filter and when it may need changing. This is pretty amazing, so you no longer have to worry about knowing when to replace the water filter. This model does it all for you.

Overall, it does perform like many other under sink water filters out there, and it may be tough to get hold of new water filters, but the LED display just changes things for us, which is why it has made it into our list.


  • The LED display is a great feature and is very easy to read
  • It does not take long to install
  • It uses RO systems, so it removes the overall majority of contaminants
  • It is very efficient
  • It leaves you with amazing water


  • It can be tough getting new water filters
  • Some people report it does not always remove a poor taste in the water

Frizzlife SK99 (Best Eco-Friendly)

With seven different filtration levels, this water filter from Frizzlife is serious about its business of removing those contaminants from your drinking water. Capable of functioning up to a rate of 60psi, it does mean it can cope with the water pressure in your home and do so with ease.

The filtration system removes 99.9% of all those nasty things in your water while keeping the useful molecules in the water. Of course, they are not the only manufacturer of under sink water filters to do this, but it’s good to know the model does not strip your water of absolutely everything.

So, the eco-friendly part comes from the fact that you only have to replace the absolute inner core of the filter housing system rather than the whole thing. Also, the water filter is capable of lasting for around three years, so you will get great value from this item.

Overall, it does not create too much waste and lasts for a long time, so we have included it in our list.


  • The filter life is impressive
  • It is easy to install
  • It improves tap water taste
  • It does not strip away the healthy minerals
  • You only have to replace a small part of the filter


  • Some people report it does not filter as well for as long as they state
  • It does take up a lot of space below your sink system

HiKiNS RO-150G

This water filter by HiKiNS does come with a 6 stage system, but don’t worry, as the company does state that it is still easy to install. Using the most advanced reverse osmosis technology removes 99% of all volatile organic compounds, heavy metals, and all other impurities.

That should all mean the water coming from this filter tap gives you cold water that tastes exceptional and straight from your kitchen sink.

For output, the company states it outperforms other systems using a reverse osmosis membrane by around 150%. That is a big claim to make, but this may be the right sink water filter for you if you plan to use a lot of water.

Also, the company provides you with a guarantee covering the first two years, so if you feel it is no longer able to remove chlorine or heavy metals in the same way as before, you can get a replacement.

Even though the valves may arrive faulty at times, we do like the way in which these under sink water filters are capable of cleaning up water relatively quickly. At least you will not have to wait around, unlike other models on the market.


  • It does appear to work faster than other water filters
  • You get a lengthy guarantee
  • It performs well with heavy metals and other contaminants
  • It removes smells and improves taste
  • You do not need to be a plumber to install it


  • It takes up quite a lot of space
  • Check the valves; some people report they turn up faulty

Finest-Filters Kit with Accessories

This model by Finest-Filters is one of the best under sink water filter options on the market, and it’s all thanks to the ease with which it can be installed. This model does use a carbon filter in its design, and it does a perfectly fine job of removing organic contaminants via the activated carbon blocks.

This under sink water filter kit is easy to install, and they do provide you with pretty good instructions on how to complete the process. Also, it does come with a chrome finished tap, so be aware you need to install this as well to take full advantage of the carbon filter.

Overall, we like how this filter performs when it comes to its ability to remove chlorine and other contaminants. The carbon filter performs well, and the filter life itself is also not too bad compared to other options on the market.


  • It acts as a water treatment under your sink
  • It shouldn’t prove difficult to install
  • The carbon filter performs well
  • The tap looks well made
  • You should notice a difference in the taste of your drinking water


  • The filter life can seem to vary somewhat
  • Be aware of the potential of drips from the fittings

Frizzlife SP99

Here we have another option from Frizzlife, and this time it’s their three-stage filtration system model. Capable of removing 99.9% of contaminants, it will also do a fantastic job of removing any smells from your water supply.

This model works well at 60psi, so there should be no issues with your water at home. As sink water filter systems go, this model will produce cold water that tastes more like bottled water for its purity, and that’s a great achievement.

It also manages to help the environment, as the filter replacements focus only on the inner core of the filter and not the entire plastic housing as well.

Overall, we love how this model can remove limescale and other nasties from the water supply, and it does so without removing the healthy minerals. If you are looking for a water softener, this model will work well even though it may be large for some.


  • It removes pretty much all contaminants
  • It can withstand a huge amount of pressure without cracking
  • It is relatively easy to install
  • You do not have to replace every part of the filter cartridge
  • It produces fantastic drinking water


  • It does take up more space than your average water filtration system
  • The tap can feel slightly flimsy

Geekpure 5-Stage

Last but not least, we have this water filtration system by Geekpure, and we still see this as a good option for the best under sink water filter on the UK market.

Their water filters use a five-stage process, so the drinking water you get should taste great. It uses some of the most advanced technology found in a water filtration system, so the filtered water you end up drinking will taste completely different to what you may be used to.

This model operates up to 60psi, and it has a maximum daily output of 75 gallons. However, that will generally be more than enough for most households.

The fittings for this model are classed as quick connect, so once everything is disconnected, it should only take minutes to complete. Plus, the tap that comes with this model looks the part, and at least there are no issues when it comes to linking the tap up to the system.


  • It uses a five-stage process leading to amazing water
  • It uses RO technology, so it removes a huge amount of contaminants
  • It produces 75 gallons per day
  • It has quick-connect fittings
  • You should have no problem connecting it


  • It does take up a lot of space
  • The tap could be better quality

What to Look for When Buying Water Filter Systems

a stainless steel tap and a glass

Having perfectly clean drinking water is a basic need, and the different water filtration systems listed above can all help in this regard. If your normal tap water is classed as hard water, then you need a sink water filter system to remove those impurities, leading to that clean filtered water that you can then drink as freshwater, tea, or coffee.

But this all depends on having the correct sink water filter system in place, and that is what we will help with right now.

The Different Types of Under Counter Water Filters

First, you should know that different types of under sink water filters do exist, and knowing about them allows you to better decide which option is best for your needs.

Reverse Osmosis Systems

A reverse osmosis system actually works by effectively pushing the hard water through special reverse osmosis water filters made up of a membrane consisting of microscopic pores. In fact, the pores are so small that the only thing capable of passing through them are water molecules.

The size of the pores then acts as the water filtration system. These reverse osmosis water filters have the ability to capture pretty much every other molecule out there, resulting in perfect drinking water.

But be aware that the filtration systems that use this as the filtration process will often come with multiple filtration systems. This includes an activated carbon filter, so a reverse osmosis filter can require more space below your sink. Also, installing a reverse osmosis filter can be slightly more complex than other options.


Ultrafiltration is another option, but you should be aware that it does not produce the same high quality filtered water as reverse osmosis. It uses a hollow membrane designed to stop all those organic contaminants from getting into the drinking water.

However, it will ensure all the healthy minerals can pass through, so you won’t miss out on those good guys.

Also, installing this option to your water supply is easy. It ties in with the main tap, but you should be aware that, in general, filter replacement is more common with this type of filtration system compared to others.

Carbon Filters

Carbon filters are the most common form of filtration system you will find, and they are capable of producing crystal clear drinking water. You will find it easy to get an under sink filtration system with this particular filter included.

Carbon works by bonding with the contaminants in the tap water while passing the water through the under sink water filter. However, do study the level of filtration as listed on the product.

But aside from the types of under sink water filters, you also need to consider other areas.

Size and Capacity

The size and capacity of your under sink water filter are certainly something to consider. For this, you must consider how much-filtered water you will tend to need at any given time.

In general, if you do not require an extensive amount of filtered water, then a basic under sink water filter will suffice. However, if you use a lot of water, then you need a different filter system, and one using reverse osmosis would be the best bet.

But a word of warning. If your under sink water filter system can pass a lot of water through the filter itself, it may not require a regular replacement of its filters. However, these models do take up more space, so always consider the room available when looking at your under sink drinking water system.

Flow Rate

Another thing to consider is what is known as the flow rate of your under sink filter. The flow rate refers to the speed at which water appears from the taps. As the tap water has to pass through a water filter first, then it will often come out of the tap slower than if no water filter was attached.

If you plan to install an under sink water filter system with a number of levels in the filter system, it will slow things down quite considerably. If you feel you cannot afford to wait some extra time for your kettle to be filled, then look at the reverse osmosis option once again. This often comes with its own tap, so it has a tendency to be faster than most under sink filters.

Water Pressure

Water pressure affects everyone and not just those with sink water filters. However, if you struggle with low water pressure, an under sink water filter can make life a lot harder.

If your pressure is extremely low, it may prevent a reverse osmosis water filter system from working as effectively as possible. This is because it relies on the pressure to push the particles through, so if the pressure is low, then this just cannot happen.

If the low water pressure is a problem, then it helps determine the best under sink filter system for your needs. At that point, you either need to change the pressure through the cold water line or look at using a filtration system that uses the likes of carbon rather than reverse osmosis.

Replacing the Filter Cartridge

The filter cartridge needs to be changed from time to time, and you certainly want it to be as easy as possible. However, not every water filter system makes life as easy as it could.

Also, pay attention to how often you need to replace the filter. Most will operate perfectly well for between 6 to 8 months. However, some are longer than this, but you then need to have a good understanding of your water and how it could affect the filter.


preparing to install a new water filtration system

The chances are that you will be trying to install this item yourself, so knowing how easy it is makes sense. The good news is that most of these water filters are indeed easy to fit. Most come with quick connections, so things effectively click into place.

However, it’s understandable you may be wary of trying it out. So, most of the companies we have included in our reviews actually provide you with instructions and guides on how to do it.

These guides are quite straightforward, so we do recommend checking them out before you get started.

Water Waste

The final point we need to mention is that of water waste. In the case of reverse osmosis, there can be quite a substantial amount of water wasted as it goes through the filtration system. You want to avoid those with a water waste ratio in the region of 3:1, as that is pointless and slows things down.

However, some RO systems come with a power pump to increase pressure. This does then reduce waste, so if this is a concern, then look for those examples with a pump included.

Making Your Decision

As you can see, there are several areas to focus on when deciding on the best under sink water filter for your home. However, we would start by looking to see if you have the space below the sink for the filter and think about whether or not you need a tap.

Also, even though they should be quite easy to install, don’t be afraid to ask a plumber to help. It’s the best option when you may otherwise make a mess of things, and it would directly affect the ease with which the filter would be able to operate.

We recommend using an under sink water purifier if you have any concerns about your water quality. In addition, any individual who lives in an area where limescale is a problem will always do better with a water filter.

The difference it can make to the water you drink and cook with will mean these products are worth the investment. The fact that the water filter replacement cartridges are also relatively inexpensive is just a bonus that should not be overlooked.

Choosing the Right Under Sink Water Filter

Purchasing the best under sink water filter UK stores can offer is not easy. All of the products listed in our under sink water filter reviews are excellent in their own right. They all do a wonderful job, and they tend to also come with easy installation.

However, for us, the leading under sink water filter system on the market has to be the iSpring RCC7P-AK listed as our editor’s choice. Out of our different under sink water filter reviews, this is the one that stood out in our research.

This 6-stage reverse osmosis filter system removes harmful contaminants with absolute ease. Even though it might be a bit large for some under sink cabinets, we still think this is a downside that you can overlook given its overall performance.

What do you think about our editor’s choice and our other options? Let us know and leave a comment below!

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