10 Best Under Sink Water Filters UK 2023

Tap water in the UK is recognized around the world as one of the highest quality. The standards of water quality the UK had set are rigorous. However, as clean their water might be, you can only be assured if you see the process of filtration by yourself.

The best way to achieve that is by installing a water filtration system. A water filtration system consists of many layers and compartments that are important to the purifying process.

The more performing the water filter is, the more assured it’s capable of providing safe, potable water. The most common filtration system used at homes is the under sink water filter.

This is basically a low-maintenance filter that can last a few months before a replacement is required. In this article, we’re going to take a look at some of the best under sink water filters in the UK you can choose.

Top 10 Best Under Sink Water Filters

HiKiNS 2012-100GPD Household Water Purifier

This filter utilizes reverse osmosis with a rejection rate of up to 97 percent. It uses high-quality polyamide film composite for large and stable water flow.

When using the system for the first time, it is advisable to discard the output water for the first 30 minutes. The expected lifespan is said to be 24 to 36 months, depending on the water quality you are feeding in.

Pros

• Utilizes the reverse osmosis process
• Can last for up to 36 months
• Allows you to save more water
• Results in a sweet and tasty drinking water

Cons

• Needs initialization

TAOEE RO Membrane Residential Household Water Filter

This filter also utilizes the reverse osmosis process. According to the testing conditions, the output water has a pH level of 7.5 which simply means it is non-acidic.

The salt concentration is about 250 ppm which means that there are very little amounts of salt in the water. Lastly, its single membrane element has a recovery rate of 15 percent.

Pros

• Utilizes the reverse osmosis process
• Easy to install
• Ideal for use on tap water, surface water, and even underground water

Cons

• No clear indication of taste quality
• No clear indication of lifespan

AEGRO Reverse Osmosis Water Filter

Like most performing water filters, this product utilizes the reverse osmosis process. It is a 3-stage filtration system that includes a small tank to store the wastewater in the process.

The system is capable of filtering particles as small as 0.0001 microns. It can remove dust and any microorganism including pollutants like chlorine, arsenic, and lead.

Pros

• Utilizes the reverse osmosis process
• Can last for up to a year
• Convenient design to make filter changes quick and easy

Cons

• Very bulky due to the wastewater storage

Finest-Filters Under Sink Drinking Tap Water Filter

This type of filter, although classified as a fridge filter, can be used for an under sink water filtration system. In fact, it is available as a do-it-yourself kit that includes a drinking faucet.

It uses a high-quality carbon filter that can remove chlorine and other contaminants which results in high-quality drinking water with a satisfying taste.

Pros

• Utilizes activated carbon filtration
• Quick and easy to install
• Comes with a high-quality carbon filter

Cons

• Can lead to improper installation if unfamiliar with basic usage of tools

Water2Buy Under Sink Drinking Water Filter System

This filter is available as a do-it-yourself kit. The filtering system used is designed to remove contaminants like chlorine and other unwanted substances which can lead to having better-tasting drinking water.

The product highly promotes environmental awareness about plastic bottle usage.

Pros

• Tasty water output
• Comes with a step-by-step installation guide
• Can remove any volatile organic compounds in your water

Cons

• No clear indication of the filtration process
• No clear indication of its lifespan

iSpring RCC7AK 6-Stage Water Filtration System

This multi-layered filtration system utilizes the reverse osmosis process. It boasts of a rejection rate of 99 percent of about 1,000 known contaminants on water. The output water has a pH level of around 7 which makes it very less acidic.

Despite being bulky in size, the installation process can be done all by yourself. It has a lifespan of 6 months and comes with a small tank for storage of wastewater.

Pros

• Utilizes the reverse osmosis process
• Features a 99% filtration rate
• Made of premium-quality components

Cons

• Very bulky due to its wastewater storage

VYAIR RO-200 4-Stage Purification System

Like the other performing filters, this one also utilizes the reverse osmosis process. It is a multi-stage filtration system that has a rejection rate of 98 percent.

With that rate, you can expect yours to have a satisfying taste. The waste to product ratio is 3:1 wherein the system can provide 15 to 20 liters of purified water from a continuous source in an hour.

Pros

• Utilizes the reverse osmosis process
• The housings are made of heavy-duty plastic casings
• Provides 15-20 liters per hour

Cons

• No clear indication of its lifespan

Aqua Quality Under-sink Line Water Filter

This type of filter is also classified as a fridge filter but can be used for an under sink water filtration system.

It uses a high-quality NSF-approved carbon filter that can remove chlorine and other contaminants, resulting in tasty drinking water. The measurement is designed to be compatible with many various refrigerators.

Pros

• Utilizes activated carbon filtration
• Compatible with various fridges
• Can last up to 6 months

Cons

• No clear indication of water flow

Aqualogis Under Sink Drinking Water Tap Filter

This one is another type of filter that is classified as a fridge filter and be used as an under sink water filter. It is available as a do-it-yourself kit that includes a drinking faucet.

It uses a high-grade coconut-shell carbon filter that can remove contaminants that are greater than 5 microns. As a result, you can enjoy high-quality drinking water with a satisfying taste.

Pros

• Utilizes activated carbon filtration
• Comes with other important accessories
• Effectively removes toxins and odor from your water

Cons

• Can lead to improper installation if unfamiliar with basic usage of tools

Finerfilters Universal Water Filter

The filter is made of NSF-approved materials. It is a fridge filter that is also usable as an under sink water filter. The filtration process uses high-quality carbon filtering to ensure that your water will taste great.

It is also designed to be a replacement filter to some of the filtration systems like the B&Q or Aquashield Filter. Like all the other fridge filters in the list, it has a lifespan of 6 months and the installation process can be done on your own.

Pros

• Utilizes activated carbon filtration
• Made of NSF approved materials
• Compatible with Aquashield and B&Q

Cons

• Comes with a small connecting size

Buying Guide

When looking for the best under sink water filter, you have to take a look at two main aspects: the filtration type and the filter’s features.

Filtration Types

Under sink water filters can be classified based on their filtration types which are as follows:

• Particulate filter

This type of filtration removes sediment, rust, sand, silt, and other noticeable particles. This type of filter is usually the first in line in the overall process during a multi-stage purification process.

• Activated carbon filters

This effectively removes mercury, lead, and chlorine which can considerably improve the taste and smell of the water.

• Oxidation-reduction or redox filtration

The main target of redox filtration is chlorine and heavy metals through a process called an electrochemical reaction.

• Ion-exchange filtration

In simpler terms, this type of filtration replaces unwanted ions, like magnesium and calcium, with the use of sodium. The filter also reduces copper and zinc while removing the water’s metallic taste.

• Reverse osmosis or RO filtration

This type of filtration is an extreme system wherein the water is forcefully passed through the membrane. The result is the collection of contaminants that are larger than molecules of water.

Unfortunately, this can mean that in every single gallon of yielded purified water, there are three to five gallons of contaminated water.

• Ultraviolet or UV filtration

This type of filtration effectively targets some bacteria and viruses traveling in the water.

Although it is uncertain whether the presence of such small organisms exists in certain tap water systems, it is proven that it has less capability of removing larger particles.

Filter Features

Apart from the filtration type, you also have to consider certain filter features such as the following:

• The filter’s lifespan

Changing filters can be quite taxing. Depending on how much maintenance you do at home, consider investing in filters that have a lifespan that is convenient for your lifestyle.

There are filters that can last for 3 months while some can last for a year without any processing failure.

• Filter size

As the name implies, an under sink water filter is installed under the sink. Therefore, its size will depend on your sink cabinet’s dimensions for ease of installing and maintenance.

• Dedicated faucet

Preferably, one under sink water filter can do its job on a single water line. Installation of such a filter directly connected with a single, dedicated faucet is ideal in order to maximize the output of the filtration process.

If you wish to add more faucets, then you might need a more heavy-duty filtration system.

• Water pressure

Some of the under sink water filters need to have a low-pressure output. It will take a longer time to fill the glass, but for those with a casual lifestyle, it may be enough.

However, if you are always on the go or have many people living together with you, you have to consider a higher pressure output to be efficient.

• Warranty

Under sink water filters also have warranties. This guarantees that you have nothing to worry about if something goes wrong.

If yours is no longer functioning properly, you can have it repaired or replaced under your manufacturer’s warranty policy.

• Price

This can be the most decisive factor. Good water quality is needed. However, under sink water filters are not portable.

If you’re not at home for the most part of the week, you might opt to invest in a smaller under sink water filter and deal with the low pressure by filling water containers and storing them on the fridge. Doing so will cost you less than investing in a bigger filter with less usage throughout the week.

FAQs Of The Best Under Sink Water Filters

Why is this type of filter placed under the sink?

One of the reasons that this type of filter is usually installed under the sink is that most water pipelines are situated on the bottom.

So as not to destroy the aesthetics of the faucet area, the filter system is installed under the sink, safely hidden in a cabinet. This also prevents exposure to dust particles from outside.

Can an under sink water filter be transferred from one home to another?

As long as you own the water filter, you can have it transferred to your new home. The system is designed to have convenient replacing of filters, therefore the entire unit itself can also be removed.

You can contact your installer and have it removed for you. However, as the filter is not portable, it can’t be used while traveling.

How do I know if the filtration process is working if there is not much difference in my tap water’s taste?

Though the UK may have one of the best water quality, you can still taste a slight difference between tap water and filtered water.

If a physical observation is very hard to be a deciding factor, you can conduct simple water quality tests at the comfort of your home without much tools needed. You just have to check some legit tutorials on the internet.

Conclusion

The best under sink water filters utilize either reverse osmosis process or activated carbon filtration. They ensure not only the purification output but also the taste of the water.

With a filtration system on your sink, you can guarantee your health by having access to safe and potable drinking water.

However, just make sure to consider the factors we’ve included above when buying an under sink water filter and go for the one that can meet your needs.