Home Kitchen 8 Best Under Sink Water Filter in 2021

8 Best Under Sink Water Filter in 2021

by Claire Martina
Under sink water filter

What is an Under Sink Water Filter?

Water is such an important part of your lifestyle. There are countless benefits of drinking plenty of water, but to make the most out of your cold water consumption you want to make sure that it is as clean and transparent as possible. Tap water contains many impurities such as dirt and chemicals so, you need to invest in the best under sink water filter in the UK to get the purest water possible.

An under-sink water filter takes water from the under-sink cold water pipe and sends it to the plastic tube where the filter is. As soon as the water is pure enough, the device uses its faucet to deliver the water to the user. This means that no water can go to waste. The under-sink water filter only filters the water that comes directly from the pipes under the sink and not the whole water supply. You can use the filter regardless of the hot or cold water as you will still be benefiting from getting clean water for cooking and drinking. You will be able to choose the best type of under sink water filter for your home after gaining insight as to what to look out for to get the cleanest water.

How to Choose an Under Sink Water Filter?

The aim for an under sink water filter is to get filtered water. There are some key features that you should keep in mind when buying a filter, such as the water pressure, size and capacity, and installation.

  • Size and Capacity

Some models of under sink filters have very good overall filtering capacity and this depends on the components of the filter cartridge. You should get a kit that will be able to filter a large capacity of water in a short amount of time. Having a filtering capacity large enough to give healthier tasting water is not the only thing to look out for, as the size and efficiency also matter. The size of the filter and the capacity should be similar so that it can be the most efficient at filtering the water. 

  • Flow Rate

A fast enough flow rate indicates the ability to get enough water in a short period of time, however; you want to think about the flow rate, if you have a large family and how you want a flow rate that remains consistent.  If the flow rate is too fast, then some of the contaminants will escape from the filtration which could affect the taste.

  • Water Pressure

For water filters, water pressure is very important. Only a few things can be more annoying than waiting a long time for a single glass of water to fill. Using a water filter capable of delivering good water pressure is especially important if you want to waste less time in filling your glass of water. On the downside, having increased water pressure results in the water spending less time in the filter, so some of the contaminants might go through the filter without being blocked and you will not make the most of the filter. This could be a big problem if the area you live in suggests that you have a highly contaminated water source. So, getting simple under sink water filters offer better water pressure than conventional ones. 

  • Odor Removal

Ideally, an under sink water filter that can remove all organic contaminants as well as odours is preferred for healthier and safer water consumption. Mostly chemical smells are the culprits for impure water, so having a filter that makes sure that the water doesn’t have a strong smell is vital. 

  • Faucet Attachment

Faucets that require very little installation make life easier. Yet, many faucets need you to drill a hole into your countertop so that you can attach the pipes properly to prevent leaks. Some water filters do not need separate faucets as they can directly be connected to your own faucet, making installation easier.

  • Installation

You would ideally want an under sink filter to be easy to install so that you can save time and energy. Installation of the sink filter should be applicable even for small spaces. Furthermore, some filters can require you to get a plumber to fix it in place, while others offer you a helpful manual.

  • Water Waste

The less water waste you have, the lower your bills will be. On the contrary, some of the under sink filters cause there to be a lot of water waste, however, this can be stored and used elsewhere, such as for watering plants, which is essential. As long as you are able to find a use for the wastewater, then it will be worth it to get under sink filters.

Our expert's Choice for the Best Under Sink Water Filter in 2021

Listed below are some of the best under sink water filters which will help you decide what best suits you.

Last updated on December 8, 2021 3:46 am
0
0

Under Sink Drinking Water Tap Filter Kit System Including Tap and Accessories

£19.99
£19.49
 in stock
2 new from £19.49
2 used from £18.73
Amazon.co.uk
as of December 8, 2021 3:46 am

This kit includes a high-quality coconut granular activated carbon filter, which reduces sediment, removes up to 97% of chlorine, other organic contaminants, odours and toxins from your water. This is very effective in giving you clean water as the taste of the water will be of a higher quality than if you did not have an under sink filter. This kit’s filter has a lifespan of up to 6 months which is dependent on the water quality in your area.

Expert Rating -
4.6/5

Pros

✅  Easy to fit under the sink

✅  Cheaper than buying a new tap

✅  Makes the water taste better and removes odours

Cons

❌ Can only be used for cold water supply

❌ Filter does not remove limescale

❌ Does not remove fluoride from the water

0
0

Water2Buy easy1 Water Filter System with 2 Water Bottles

£29.99  in stock
Amazon.co.uk
as of December 8, 2021 3:46 am

This stainless-steel tap filter produces great tasting water which is a perfect alternative to jug filters and bottled water. The water filter is made from coconut shells. It produces no waste water and removes chlorine, bad tastes and bad odours. It will provide 6000 litres of filtered, clean water for 6 months before the filter needs to be replaced. Replacing the filter is not a strenuous job as it only takes up to 5 minutes. 

Expert Rating -
4.6/5

Pros

✅ Very easy to install

✅ Only takes 5 minutes to replace the filter

✅ Includes two water bottles

✅ Does not take up much space under the sink

Cons

❌ The limescale is not reduced

❌ Replacement filters have to be bought separately

 

0
0

Frizzlife Under Sink Water Filter-NSF/ANSI 53&42 Certified Drinking Water Filtration System

£89.99  in stock
2 new from £89.99
Free shipping
Amazon.co.uk
as of December 8, 2021 3:46 am

FRIZZLIFE’s under sink water filter includes a stainless steel faucet and a carbon filter cartridge. No plumbing is required for the installation as it comes with a water adaptor so you can mount your water filter in 10 minutes. This unique technology helps remove up to 99.9% of contaminants like metals, chlorine and carcinogens to eliminate bad tastes and odours and to give pure water. The flow rate is quite high so you can get a reasonable amount of water quickly. It is suggested that the filter get replaced every 6-8 months as the cartridge can be used for 2 years before you need to get a new one.

Expert Rating -
4.7/5

Pros

✅  Quick to install

✅  Includes an auto-shutoff switch where you do not need to shut off the water supply when working on the filter cartridge replacement

✅  Less plastic wasted when only the filter needs to be changed and not the whole plastic part

Cons

❌ The tubing may be quite stiff for attachment

❌ Can cause leaking so may need to be installed with a plumber.

0
0

Waterdrop RO Reverse Osmosis Water Filtration System

 out of stock
Amazon.co.uk
as of December 8, 2021 3:46 am

Waterdrop uses a different process of filtration called reverse osmosis. This method is known to be very efficient and has lower maintenance compared to under sink water filters. It is ideal because it does not just remove contaminants like metals like any other filter, but can get rid of dissolved particles as well, so it maximises the efficiency of getting the cleanest water possible. In addition, this product saves the water waste more than normal carbon filters and it is advised that you can use the waste water for other purposes like watering the plants. Since it is electric you may need to be careful when you have power outages.

Expert Rating -
4.6/5

Pros

✅ Has a light on the faucet to let you know when the wastewater is being flushed away

✅ Good water pressure

✅ One of the smallest reverse osmosis systems so stake up very little storage space

Cons

❌ Has a noticeable noise when turned on

❌ Not very cheap to install

❌ More expensive than regular under sink water filters

0
0

Water2Buy easy1 Water Filter System | Under Sink Water Filter tap Easy DIY Kit

£24.98
£23.31
 in stock
1 used from £23.31
Free shipping
Amazon.co.uk
as of December 8, 2021 3:46 am

To have an under sink water filter that can easily attach to your cold water pipe is essential as it can provide you with clean water easily and it does not require any power. It is better than having jug filters and bottled water as jug filters may not be able to get rid of the minute contaminants and bottled water is expensive. The replacement filters have to be bought separately but they do not take a long time to put back on the filter.

Expert Rating -
4.7/5

Pros

✅  Gets rid of the chlorine smell and the bleach taste very well

✅  Easy to mount

✅  Takes up very little storage space

Cons

❌ May have to change the filters more frequently depending on the size of the household

❌ Instructions included are not detailed enough

0
0

Frizzlife Under Sink Water Filter System

£139.99  in stock
Amazon.co.uk
as of December 8, 2021 3:46 am

This FRIZZLIFE filter has a three-staged processing filter to make sure that as much of the contaminants in the water are removed as possible. Stage one blocks debris and reduces small particles. Stage two effectively removes the chlorine and chloramines. Stage three uses the carbon filtration to further refine the water to eliminate heavy metals. A flow rate of 1.5 GPM indicates that there is a fast water flow so you are able to get clean tasting water. This flow rate is good because the water will stay in the water for longer and so it is more likely to get filtered thoroughly than if the flow rate was higher. This product saves you from wasting plastic as well as water. 

Expert Rating -
4.7/5

Pros

✅ Connects easily to the cold water supply

✅ It has a fast and stable water flow rate

✅ It is easy to install and can also be used to serve the fridge

Cons

❌ You need to replace the three different filters at varying months so it can be difficult to keep track of which filter stage to replace

❌ Does not have an auto shut off feature

0
0

iSpring CU-A4 4-Stage High Capacity Premium Under Sink Drinking Water System

£227.42  in stock
Amazon.co.uk
as of December 8, 2021 3:46 am

The iSpring water filter system is quite expensive, if you are willing to spend a lot more than the basic water filters. However, it can be assured that this is worth the price as it comes with a four stage design where it removes large particles like sand, then filters out chlorine and chloramine using kinetic degradation fluxion (KDF) and granular activated carbon (GAC). There is no storage water tank required and this can be used for the sink, fridge and even for coffee makers. The filter life, like most filters, is around 6 months, but depends on the source of water and the usage.

Expert Rating -
4.7/5

Pros

✅ Smaller than reverse osmosis systems so it takes up less storage space

✅ Great taste of water

✅ No leakage when fitted correctly

Cons

Replacing the filters at different months can be hard to keep a track of

❌ Requires drilling a hole through the countertop to fit the faucet

❌ Installation manual is not descriptive enough

0
0

Finerfilters Classic Undersink Drinking Water Filter Kit System

£34.99  in stock
3 new from £34.99
Free shipping
Amazon.co.uk
as of December 8, 2021 3:46 am

For good water quality and good ease of installation, this product fits that description. It does have a low flow rate of 0.5 GPM because of the small piping, however, this does compensate for the quality of tap water, as it takes away the chemical taste. So this is a better alternative for bottled water as it is cheaper and cleaner. Furthermore, the GAC used helps purify the water to the best of its ability. This filter has a reasonable capacity of 1.5 litres so it is large enough for a large household. After 6 months the filter needs to be replaced.

Expert Rating -
4.6/5

Pros

✅ The water pressure can be varied according to your need

✅ Has a large capacity

✅ Water quality is good, clean, and clear

Cons

❌ Low flow rate

❌ The faucet’s quality is low compared to the quality of the water you get out of it

❌ Installation is quite difficult

Benefits of using an Under Sink Water Filter

There are many ways in which an under sink water filter can benefit you, for their main aim is to reduce contaminants, but there are other ways in which this can be beneficial.

Here is a list of how using an under sink water filter will benefit you:

  • Filters are very good at removing the bad smells and tastes from the water.
  • There is removal of sediments as the cartridge filters are designed to remove large contaminants from the water.
  • Chlorine is removed using the carbon filter and there is less fluoride when using an alumina filter.
  • Arsenic is removed from the water via the alumina filter
  • A resin cartridge helps remove nitrites and nitrates as these are dangerous for children and the elderly. 
  • There is a lower amount of limescale buildup on your sink.
  • The under sink water filters can block bacteria from reaching the faucet. 

How do I choose an under-sink water filter?

Choosing an under sink water filter correctly for long term use is important, but so is choosing one that works efficiently. You want the best under sink water filter that can give you healthier, nice tasting water every day. Furthermore, it means that you do not have to waste time and money on external water filtration jugs.

Nonetheless, it is essential to think carefully about what you need from the easy installation to the ability of filtering harsh chemicals. You need to look for the under sink water filter that can offer the highest quality of results that you need.

How often should I change my under-sink filter?

It can be tiresome to change the filter every 6 months, especially if it can be difficult to install, therefore, you want to look for a sink filter that is easy to install, takes less than 30 minutes, and has a good lifespan overall. Some filters only need to be changed every 5 years, while others may notify you when it is time to change the filters. As long as you have an under-sink filter that is easy to change and that lets you automatically know when it needs to be changed, you may find this less of a hassle.  

It is best to keep an eye out for when to change the filter as the carbon will continue to absorb contaminants only until it’s pores are filled so this is why you need to replace the filter. Once the filter pores are filled you will be prone to getting contaminants in your water.

Under Sink vs CounterTop Water Filters

Under-sink and countertop water filtering systems both use activated carbon filters as their main component. Each of them has advantages and disadvantages.

Under Sink Systems

There are two different types of under sink systems: simple under sink system and the conventional under sink system. The simple under sink system has all the cold water supply diverted to its filter so the water is directly delivered to the regular faucet, whereas, the conventional under sink system needs two different faucets where you can get filtered and unfiltered water. 

Pros:

  • Hidden away from the kitchen design so does not ruin the look of the kitchen
  • Usually installed in a cabinet under your sink so do not take up space on countertops
  • Have good filtration rates as opposed to countertop filtering systems

Cons: 

  • They are larger than countertop water filters so will take up quite a bit of storage space
  • Can be harder to install

Countertop Systems

As suggested by their name, they are placed on the countertop. They provide the same outcome as under sink water filters, but instead, are placed on the counter.

Pros:

  • Small so do not take up much storage space
  • Easier to install than under sink systems
  • Easy to carry

Cons:

  • It has a slower filtration rate as they take longer to filter the same volume of water compared to under sink systems.
  • The overall kitchen design may not look as appealing with this in display

Which is the Best Budget Under Sink Water Filter in the UK?

In the UK, the best budget under sink water filter is the Water2buy water filter system which includes two water bottles. The easy installation, removal of chlorine and bad tastes and odours shows the versatility of this product as it, ultimately, provides you with clean tasting water.  

Best Overall Under Sink Water Filter - Experts pick

The best overall under sink water filter chosen by experts is the Waterdrop reverse osmosis water filtration system. This is a good choice because it uses a different method than most other water filters to ensure you get the cleanest water possible. Boasting good features of the removal of contaminants and with easy installation, this under sink filter is the best option as it also offers a light on the faucet to let you know when the water is being flushed away. 

Best High Capacity under Sink Water Filter - Recommended

High capacity for under sink water filters is highly recommended as it gives you more water that can be filtered in one go. For this reason, Water2buy water filters seem to have a large capacity of water that can be provided for around 6 months. 

Summing up

Providing a safer and inexpensive solution to cleaner and healthier water, as discussed in this article, should give you insight on how best to choose an under sink water filter for your household. There are different processes varying from the conventional under sink filters to simple filters to reverse osmosis. It is up to decide what will work best for you.

Related Articles

Leave a Comment