How to Install a Whole-House Water Filter — A Practical Guide

Contaminated water doesn’t just affect what you drink. It impacts everything from brushing your teeth to showering to washing vegetables. That’s why a whole house water filter makes so much sense: it catches contaminants at the source before water reaches any tap in your home.

For kitchen-specific filtration, learn how to install an under sink water filter. But if you want protection at every faucet, here’s how to install a whole house system yourself.

All these health concerns are due to the presence of contaminants in the water we use. There are different types of purification processes available, from chlorination to water filters that run with cartridges.

The filtering of water is a must in our daily lives. To meet purification and filtration requirements for various purposes in our houses, knowing how to install a whole house water filter is recommended.

It will eliminate the contaminants present in the system.

Benefits Of Installing a Whole House Water Filter

The benefits of using a whole house water filter are significant:

• It will make you feel safe and free from bacterial contaminants
• The whole house water supply system is always under monitoring, so there’s no need to worry about impurities
• The filtered water can be used for cooking, drinking, and more
• It saves money from buying clean water or RO water from water plants. For well owners, see our guide on how to install a whole house water filter on a well
• You can supply quality water to others and create a disease-free environment

Either you can directly install the filter by yourself or approach an expert for installation. You may also want to learn about the best sediment filters for well water if you have a well. Here, we’ll make your task easy for a self-installation.

This will allow you to choose the right place in your house to fix the filter, because nobody knows your house more than you do. After identifying the place, you can go for procuring the tools which are required for this installation.

Tools Required For Installation

You’ll need the following tools:

• Screwdriver sets
• Drilling machine
• Twisted drill bits
• Tube cutter
• Wrench (adjustable)
• Bucket

Materials Required:

• Whole house water filter kit (new)
• Teflon tape
• Stop valves

Step 1: Selecting The Brand Of The Filter

Your choice and your taste must be treated as the major factors here. There are many brands out there in the market, and they all provide basic, advanced, and customizable options for your filter.

It completely depends upon your selection, whether you’re going to purchase a particular brand for its reputation or performance.

Here are a few simple tips while choosing a brand that will serve all your needs. The selected brand must be free of any controversies.

It should meet all the norms of basic goods standards and other electronic-related guidelines.

A brand can be selected by approaching customers who have already used it or are still using it. Seeking their suggestions will provide you an insight into the product.

Don’t go for a product due to social media buzz or ratings alone. Visit the official company website and read through all the features and specifications before making a decision.

Step 2: Choose The Filter Based On Features

We’ve been introduced to the latest technologies and brands these days. There are numerous functionalities with advanced features and additional options placed in modern products.

The same basic product from a few years ago may be outdated. Note down all your requirements and compare those points with the features mentioned on the product.

If there’s a 60% or more match, then you can go for it.

Take time to do some research on choosing the filter type. Understanding the different filter options will help you avoid the regret of purchasing a bad product and ending up paying for unnecessary service.

It’s also recommended to purchase a larger water filter, as it will be more durable and able to supply a greater quantity of water with longer service life. Be aware of potential whole house water filter pressure drop issues. You can’t expect a filter that’s smaller than the ideal size of 4.5” x 20” to withstand all the pressure of the water flow.

Don’t compromise on the price. The filter is fitted at your home for your health and safety to make sure the purity of the water you consume. If you prefer a smaller point-of-use water filter, those are also an option.

Choose a big filter with all the best features.

Step 3: Identifying The Location Of The Filter

You need to locate the best place to position the water filter. The area must be spacious and easily accessible by anyone.

This is where all the installation begins. Make sure to select a wall that’s strong enough to hold the setup.

Extra space is required surrounding it, as it will help you move freely during cartridge changes and cleaning. Once the location is selected, follow these safety tips:

• Install the filter where there’s no impact of direct sunlight, since it will damage the cartridge sooner
• Consider whether to install the water filter before or after the water softener
• Use a standard three-valve plumbing bypass so the filter can be used for other high-usage needs
• Leave at least 5 inches of clearance beneath the unit for cartridge replacement
• Based on the area available, the filter can be mounted in different directions, including sideways or upside down
• However, the risk involved in non-standard fitting is that changing the cartridge will become a tough task

Step 4: Follow The User Guide

There’s a user guide with instructions on how to install the filter and what care should be taken. Go through all the points mentioned in it and take all the precaution measures listed in the manual.

Ignoring the manual and doing everything by yourself might lead to ending up with some mess. In certain situations, it can even result in the termination of the warranty period.

So never skip going through the user guide or manual during installation. It will assist you in how to handle the equipment properly.

Step 5: Draining Of The Water Supply System

The water supply system must be drained before installation by turning off the water supply, releasing the pressure, and draining the water.

All of this should be done before installation begins. The best method to drain the water is to turn on a faucet, which will relieve the pressure in the system.

Step 6: Cutting The Pipe

After draining the water supply, you need to move to the user guide provided with the filter kit. Check for any leaking issues at existing connections before proceeding. Make some markings for accurate placement of the pipe.

Since regular cartridge changes are required, the location selection from Step 3 is important here. Always remember to have good space to allow yourself to move your hands freely.

The clearance should be on top, below, and on both sides of the filter system.

With the help of a pipe cutter, make two cuts and take out the marked section of the pipe. Then rotate the cutter around the pipe after tightening it so the blade lines up with the mark you made.

Rotations should be made tightly and repeatedly until it cuts through completely. Carrying a bucket will help you catch the excess water released from the cut.

Make sure the cuttings are well finished without leaving any traces or iron leftovers accumulating on the edges of the pipe. An iron water filter can help address any iron-related water quality issues. You can also cut using a mini cutter.

Some pipes that are too old may need extra support during the cutting process to prevent leakages. It depends on the type of material used to design the pipe and the rigidness of the pipe.

Step 7: Attaching The Fittings

Follow the instructions of the manual mentioned in the product guide. Using a compression nut, you can attach the fittings.

Use Teflon tape to seal between the fitting and the filter port.

Prevent over-tightening, as this will make the entire system hold on too hard and might not function well. For different products there are different types of steps and precautions.

Check that you read all the points carefully to avoid damage to the filter system.

It’s recommended to have a family member, friend, or someone who is aware of fittings and water filter assembly. They will assist you better by giving suggestions about the quality of the material you’re using during the fitting process.

Step 8: Positioning The Filter

The filter is now fitted on the water pipe. Care should be taken that the setup is free from errors and the inlet and outlet connections are made according to the water flow and directions.

Don’t shake the filter once attached to the pipe, as this will loosen the tightening and will cause the water to leak. Allow the filter to hang on to the pipe and test its performance.

Remember that the cartridges inside and the filter itself must be in a straight position at 90 degrees. If the filter is exactly perpendicular to the pipe, then the functioning of the filter will be without any disturbances.

Step 9: Turning On The Water

The kit with the filter will have different valves and positions, which can be switched between functionalities like “on,” “off,” and “bypass.”

After positioning the filter, make sure the valve on the filter is turned to off. Then turn the water back on at the main valve of the house.

Now it’s time to check the filter for any water leakages. Turn the valve of the filter to the filter position, and you’ll observe that the tank will fill with water and the setup will begin the filtration process.

If you detect any housing problems or leaks at compression points, tighten the screws until the leak stops. You may also want to add a spin down water filter as a pre-filter to protect your main filter.

Step 10: Cleaning, Changing The Filter

As per the recommendations of the installation personnel or depending on the manual, there’s a need to change the cartridge at regular intervals.

In any kind of filter, cleaning and changing of the cartridges are common tasks. A sediment filter cartridge typically needs replacement every 3 to 6 months. With the whole house water filter, extra care should be taken to keep an eye on any leakages or loosened joints that may result in the unit failing altogether.

While changing the cartridge, always turn the valve position of the filter to off and carry out the process. Wipe the inside of the filter with a clean dry cloth, and install the new cartridge.

This can be done by following these steps:

• Turn off the incoming water before the whole house water filter
• Relieve pressure by pressing the pressure release button (usually red) or open a downstream faucet
• Apply some lubricant on the O-ring section while opening it
• Remove the filter sump with the help of a water filter wrench, then replace the filter cartridge
• Check the water filter O-ring for wear before reassembling
• Note that there’s no directional marking on the cartridge. Make sure you fix the cartridge in the right position based on your fitting
• After replacement is done, turn on the water and check for any leaks

The same steps should be followed each and every time you replace the cartridge.