How To Install A Double Water Filter?

Installing a double water filter is not as intimidating as it may seem. You can have a clean and safe water supply for everyday use in just a few simple steps. Installing a double water filter requires careful consideration of several factors, including the type of filtration system you need and the cost associated with installation. Determine what filters you need based on the water’s impurities level. You also have to consider the size and layout of your plumbing system and any additional components that may be required for installation.

What Is A Double Water Filter?

What Is A Double Water Filter
A Double Water Filter

A double water filter is a system that uses two separate filters to purify water. The second filter is a backup and ensures that even smaller particles are removed, resulting in cleaner and safer drinking water. This filtration system is used primarily in homes and businesses that require high-quality drinking water, such as those located near industrial areas. It is also used in places where the water supply is subject to contamination, such as hospitals and nursing homes.

Things you will need

Things you will need
Things you will need
  • Crescent
  • Sharp knife
  • Thread tape
  • Drill
  • Towel
  • Electrical Tape
  • Pen/Pencil
  • Hole punch or sharp object

How To Install A Double Water Filter?

Please turn off the water supply: Before beginning any installation, it is essential to turn off the water supply. This will help ensure that no water comes through during the installation process.

Turn on the tap to empty the waterline: After the water supply has been turned off, turn on the tap to empty the waterline. You may need to leave it running for several minutes until all the water is gone from the pipe.
Release the pressure: Once all the water is out of the pipe, you will need to release any remaining pressure. To do this, open a faucet near where you are installing the filter and allow air and pressure to escape from the line.

1-Install the T-Piece

Install the T-Piece
Install the T-Piece

Undo the flexible chrome hose: To install the T-piece, start by undoing the flexible chrome hose. This is where you want to install the filter, which can be undone by unscrewing it from its connection point.
Screw the female end first: Unscrew the female end of the double filter, then bind a teflon tape to the threaded part. Insert the filter into the socket and screw it clockwise until firmly attached.

Screw pipe back onto the top of the T-Piece: Once you have it in position, screw it back onto the top. Ensure the sealant has dried and the two filters are firmly secured to either side of the T-Piece. Ensure that there is no leakage from any of the joints before you move on to connecting your water supply.

2-Install The faucet

Install The faucet
Install The faucet

Drill The Hole In The Sink Surface: On the sink surface, mark two spots with a marker where you’d like to install the faucet. Use a drill with a masonry bit to make two holes for the faucet.

Put the single rubber washer onto the faucet: Once you have everything ready, start by putting the single rubber washer onto the faucet. This will provide a seal between the filter and the faucet, ensuring that no water is wasted and all of it goes through your filters. Make sure you install the washer on an even surface to ensure a proper fit.

Peel the protective coating off: Start peeling off the protective coating from the water filter. This will help to ensure that the filter will fit snugly in its designated area and provide a better seal.

Slide the chrome plate onto the faucet: The chrome plate should fit snugly onto the top and provide a secure base for the filter housing. Secure the connection: The chrome plate should have two screws – one to attach to the faucet and another to secure the filter housing.

Push the faucet into the new hole: Now that the hole is cut, you can push the new faucet into its place. First, put some plumber’s tape around the threads of the spout before pushing it into the hole. Secure it with a wrench until it is tight and won’t move anymore.
Take the black plate: it holds the two filters. Place it against the wall and mark where the screws should go. Drill pilot holes in the marked spots with a 1/8-inch drill bit, then insert plastic anchors to secure the plate firmly to the wall.

Lock washer and nut: Once the filter housings have been installed, you will need to fit the lock washer and nut onto the filter housings. As these are metal components, make sure to handle them with caution. Place the lock washer between the housing and the nut, then use a wrench to screw them together until they are firmly in place.

Tighten it with a spanner: Next, use a spanner to tighten the two water filter housings. Make sure that you fasten them securely so that there are no leaks. You can also apply some PVC tape or pipe thread sealant to ensure that there won’t be any leaks.

Connecting The Water Hose To The Faucet: Connect one end of the hose to the faucet connection and tightly secure it with a wrench.

3-Install and Mount Your Water Filter

Install and Mount Your Water Filter
Install and Mount Your Water Filter

Mount your water filter: Depending on the mounting area, use appropriate screws or nails to secure your water filter in place.

Drill two pilot holes: Once you have the filter in the desired location, it’s time to secure it. You’ll need a drill or other tool to make two pilot holes to insert screws into the mounting surface. Ensure the screws are long enough to hold the filter in place securely.

Partly screw two screws: After you have fixed the filter holder to the water pipe, use two screws to partly screw the nuts on both sides of the filter holder. Make sure that it is not fully screwed yet so that you can adjust the angle and position of the filter later. Then, tighten the nut with a wrench and ensure it is firmly in place.

Connect up the pipe from the T-piece: It should fit snugly into the bottom of the first filter housing. Use some thread tape or sealing compound around the edges to ensure a tight seal and no leaks.

Connect up the pipe to your faucet: Once you have determined the position of your filter, it’s time to connect up the pipe going from it. If your filter is a double water filter system, there will be two outlets out of the unit: one for filtered drinking water and one for unfiltered cold water that goes into the faucet. The filtered drinking water outlet tube should be connected to the faucet.

Begin flushing cartridges appropriately: It is essential to flush them properly before installation. To begin, take the two cartridges and remove their caps. Submerge each cartridge in a bucket of water for about 5 minutes each. During this time, allow the water to drain from the open end of the filter. This will ensure that any dust or debris will be removed from the filter. After flushing, proceed to install the cartridges into your water filtration system.


Do you attach a water purifier to the kitchen faucet?

Yes, some water purifiers can be attached to kitchen faucets. Most water purifiers come with the necessary components and instructions to install them on your existing faucet.

Can I use a water filter and water softener Simultaneously?

Yes, you absolutely can use a water filter and a water softener at the same time. This is possible by installing both systems in series, with the water filter going first. Installing in this manner allows for the efficient removal of contaminants with the water filter before it passes through the water softener to remove hardness.

Should I install a water purifier or use a traditional water filter?

The decision to install a water purifier or use a traditional filter will depend on your individual needs. The most crucial factor to consider is the quality of your water source. A traditional filter may suit your needs if you have access to high-quality tap or healthy water.

How long do I run a new water filter before drinking water?

Once installed, it is recommended that you run clean (untreated) water through it for at least 20 minutes before using any filtered water.

Can you add DIY filtration for off-grid homes?

Yes, it is possible to add DIY filtration for off-grid homes. A double water filter system can be installed relatively quickly and provides an economical solution for clean drinking water without relying on grid-based utilities.


Once the double water filter is installed, it is essential to test its performance. If you notice any issues with your filter or if it’s not working correctly, make sure to contact an experienced plumber to help fix it. Proper maintenance and regular cleaning of the filters should last several years before needing to be replaced. Keeping your double water filter working correctly will ensure that you and your family have access to clean and safe drinking water.

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