Learn How To Change An Under Sink Water Filter On Your Own

So, has the water started to taste funny to you and you don’t have a filter jug? You’re thinking about switching to bottled water, but you don’t want to pollute the Earth a little bit more. And here’s the dilemma: save the planet or keep drinking the weird water? Well, we have a solution for all your problems. All you need to do is change the under sink water filter, and you can enjoy the sweet tap water from your faucet back again. 

An under the sink water filter

You might be wondering that you will not be able to do this job alone and need a plumber to make the change but fear not. With this simple guide, you will remove the old filter and have access to drinking water all by yourself! Before we begin, let’s find out what these under the sink water filters are. 

What are under sink water filters?

Under the sink water filters, also known as water softeners, remove chlorine, fluoride, calcium, and sediments from the tap water

For many people, it is not feasible to install a sink water filter system for the whole house. However, the water is good enough for various chores such as laundry and showers, but it is not drinkable. In that case, you can place a separate point-of-use water filter under your sink right in your kitchen. 

It can be set right under your kitchen sink in the cabinet, and it will filter water directly to your kitchen faucet. It is connected to your water line, and when the water passes through the filter, it removes the harmful contaminants, and you get pure and clear water through the reverse osmosis technique. 

Are they worth it?

If you have been using pitchers, you know how much of a pain it is to replace them after every few hours. With the under sink water filter installed, you can drink water directly from your tap without making constant changes. 

A man holding a glass of water under the filter tap

Rather than using countertop filters or water pitchers that clutter the kitchen top, this option stays hidden under the kitchen sink and is easy to maintain

The other thing worth noting is the cost reduction on the maintenance. For water pitchers, you will need to put in the new filter every two months, whereas an under the sink water filter will not need a filter change for at least six months

After analysing all these pros, we can agree under sink water filters are the perfect choice for the water filtration system at your house. 

How to install under sink water filters – A complete guide

Now that you have chosen to install this type of water filter, you need a step by step guide to placing it in your kitchen that will give you pure drinking water. So, let’s begin the easy installation

Step 1: Turn off the water connection

Before we begin with the process, make sure you have shut off the cold water connection. If there is a pipe burst, it will not be ideal to have water all over in the kitchen. 

You can find a valve next to the water supply. Rotate the shut-off valve till it is closed and detach from the main water line. You can easily do this by releasing the nut and unlatching the tube off.

Once the water connection is off, you will need to drain all the water out of the system. You can do that by leaving the faucet open till it drains out all the water.

Step 2: Set your mark

To improve your water quality, set the mark where you want to place the water filtration system before drilling a hole in the wall. Along with that, you will also need to figure out the placement of a filter tap.

A tidy sink with a tap and a filter one

You can do that by placing the under sink water filter near the cold water supply and marking the place where the screws will be. 

For the new tap, you will need to plan the position for it. If you have an existing soap dispenser or another faucet that you can reuse, you can continue to the next step. Otherwise, find the place for it and mark it. 

Step 3: Make a hole

If you do not have an existing faucet hole you are using, you will need to make sure the mark is correct before you drill. You cannot mend a hole in the sink once it is forged. 

Generally, you will need to drill a 6.35mm hole, but it depends on the material of the sink. If it is made of granite or ceramic countertop, you might need to look into different ways to form that hole. 

In case you have a steel sink, you can always DIY. All you need is the carbide-tipped blade to make a 6.35mm hole. Make sure to apply some lubricant to avoid overheating. 

Step 4: Split the lines

To enjoy the purified water, you will need to separate the existing water line into two. One will go to the current faucet, while the other will connect to the new tap through the under sink water filtration system.

Firstly check if your under the sink water filter has a splitter. Otherwise, you will need to purchase one, which is quite common to find at any hardware store. If the pipe is 12.7mm  fittings, you will need a 6.35mm adapter. Connect it to the splitter in the cold water shut-off valve

Step 5: Set up the water filter kit

We are almost at the end, do not give up yet. All we need to do now is connect the water filter kit to the respective water supply

A man installing an under the sink water filter

Your sink water filter system will have two valves. One is to let in the unfiltered water while the other filters out the clean water to the new faucet. Ensure that all the screws are in place on the mounting bracket.

Step 6: Place in the faucet

Well, now is the time to place in the fresh filter tap that will give you access to great-tasting water. The drill hole is already in place, and the hose connects to the faucet.

The faucet will be placed from the top, and the hose will be connected from the bottom that is coming out of the filtered water valve. After screwing the hose and the tap together, make sure to lay down the plumber‘s putty to secure the new filter tap and prevent any future leaks. 

Step 7: Turn cold water on

The time has come to check the sink water filter system. First, turn the shut-off valve slowly and wait for the air to come out. Usually, they come with an air release valve so make sure that you turn that on before you open the chilled water outlet. 

Give a few minutes to clear any dirt particles from the main supply line that might have build-up during the installation. Once the clean water has run through, you can enjoy the filtered water that has been sterilised. 

Step 8: One last check

Before you tick this task off your list, check all the connections in the system to ensure there are no leaks. Even a minor leak can create a huge hassle in the future, and you want to avoid that. If the water flow rate is normal, your water filter is good to go!

A close up of an under the sink water filter

It is crucial to have a healthy body, and everything starts with clean water. If you are looking to buy a filter, make sure that the under the sink water filter cartridges have a carbon block that allows a reverse osmosis system that turns tap water into clean water. In addition, it is advisable to have a 5 – 10 micron water filter to make sure all the sediments are refined. With this simple installation guide, you can save you hundreds of pounds, your body from dangerous chemicals, and Earth from plastic overload!

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