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How to Install an Under Sink Water Filter

By Jeff Wise September 30, 2022

Did you know that around 40% of Americans use some sort of water filtration system?

You're interested in installing a water filter, but don't know where to start. Installing a water filter can seem daunting, but it's a very simple process. All you need is a few supplies and about 10 minutes of your time.

Want to learn more? Keep reading because we've put together this easy-to-follow guide on how to install under sink water filter. With just a few simple installation tips, you'll be up and running in no time!

How to Install an Under Sink Water Filter

Can Anyone Install an Under-Sink Water Filter System?

You can, but it's probably not the best do-it-yourself (DIY) project. Drilling holes in your sink and connecting water lines are not for everyone.

That being said, if you're somewhat handy and have experience with basic plumbing, then go for it! There are plenty of instructional videos and articles out there to help guide you through the process.

What Tools and Supplies Do You Need for Installing Under-Sink Water Filters

Ready to start installing an under-water filtration system? Let's look at the tools and supplies you are going to need:

  • Drill
  • Hole saw or jigsaw
  • Measuring tape
  • Marker or pencil
  • Adjustable wrench
  • Pliers
  • Teflon tape
  • Hack saw (optional)
  • Under sink water filter kit (your kit will come with specific instructions, so be sure to follow those)

You can buy these supplies individually or in a kit. It's really up to you.

How to Install Under Sink Water Filter

Now that you have the things that you need, it's time to begin the installation process. Here is our simple follow-along guide:

1. Switch off the Cold Water Supply

To prevent your pipes from freezing, it is important to shut off the cold water supply to your sink. There should be a valve under your sink. If there isn't one, then you will need to shut off the main water supply to your house.

This will help to prevent the water in your pipes from freezing and causing them to burst. In addition, it is important to insulate any exposed pipes.

You can do this by wrapping them in newspaper or towels. By taking these simple steps, you can help to prevent costly damage to your home.

2. Disconnect the Tubing

Before you begin any repairs on your faucet, it is important to shut off the water supply. This will prevent accidental flooding and ensure that you can work freely without worry. The next step is to disconnect the tubing that supplies water to your faucet.

There should be a coupling nut that you can unscrew by hand. If it's too tight, then you can use an adjustable wrench. Once the tubing is disconnected, you will be able to access the faucet's inner workings.

From there, you can assess the problem and determine the best course of action. With a little effort, you should be able to fix your faucet in no time.

3. Install a T-Adapter

Most under sink water filter kits come with everything you need for a successful water filter installation, including a T-Adapter. In some cases, however, you may need to purchase a T-Adapter separately.

If this is the case, then simply follow the instructions that came with your kit. Most T-Adapters can be easily installed in minutes, and they will help to ensure that you're under sink water filter is properly connected to your home's water supply.

As a result, you can be confident that your family is drinking clean, filtered water.

4. Join the Filter’s Tubing to the T-Adapter

Next, you will need to join the filter's tubing to the T-Adapter. Again, simply follow the instructions that came with your kit. The process is usually pretty straightforward: just line up the tubing with the correct opening on the adapter and give it a good push until it's snug.

Once everything is properly connected, you're ready to start filtering your water. Enjoy your clean, refreshing H2O!

5. Drill a Hole for the Faucet

Before you can install your new faucet, you will need to drill a hole in the sink. This is where a drill and hole saw (or jigsaw) come in handy. The size of the hole will depend on the type of faucet you are using, so be sure to consult your kit's instructions for more specific information.

To drill a hole in your sink, start by using a measuring tape and marker to find the center of your sink. Then, gently drill a pilot hole. Once the pilot hole is drilled, you can use the hole saw or jigsaw to cut out the larger hole. With a little patience and care, you'll have a new faucet installed in no time!

6. Install the Faucet

Now it's time to install the faucet. This part is pretty straightforward. It's handy to have a friend help you with this part, as it can be a little tricky to hold everything in place while you're trying to screw it in.

To install the new faucet, simply follow the instructions that came with it. Once it's in place, you can then attach the tubing. Make sure to use Teflon tape around the threads to create a watertight seal.

7. Mount the Filtration Unit on the Wall

Most under sink water filter systems will need to be mounted on the wall. This is usually pretty easy to do. There should be some screws and wall anchors included in your kit.

To mount the unit, first, use a marker or pencil to mark where you plan on mounting it. Then, drill pilot holes and screw in the wall anchors. Finally, screw in the unit itself. By following these simple steps, you can ensure that you're under sink water filter is properly installed and ready to provide clean, fresh water for your home.

8. Connect the System to Your Plumbing

The final step in installing your under sink water filter is to connect it to your plumbing. This is a relatively simple process, but it is important to follow the instructions that came with your kit carefully.

Generally, you will need to connect one end of the supply line to the cold water inlet on the filter and the other end to the Cold Water Supply Line under your sink. Next, connect the drain line to the drain valve on the filter.

9. Switch on the Water Supply

The final step in installing your new kitchen faucet is to turn on the water supply. Start by turning on the main water supply to your house. Once that is turned on, you can then turn on the valve under your sink.

If your filter system has a separate faucet, then you will need to open that up as well. Run the water for a minute or so to clear out any air that might be in the lines.

Your brand new faucet is now ready for use! Enjoy your upgraded kitchen and all of the new culinary possibilities that await you.

10. Check the System for Leaks

Now is a good time to check the system for leaks. Turn on the faucet and check all of the connections for any leaks. If you see any, then simply tighten the connection until the leak stops.

11. Flush the Filters

Under sink water filters are a great way to ensure that your tap water is free of contaminants. However, before you can start using your new filter, it's important to flush the filters.

This will remove any contaminants that might be on the filters, and help to extend the life of your filter. To flush the filters, simply run water through them for a few minutes.

Consult your user manual for specific instructions on how to do this. By taking the time to flush the filters, you'll be able to enjoy fresher, cleaner water for years to come.

What Type of Water Filter Works for Your Household?

So there you have it! You now know how to install under sink water filter systems. But what type of water filter is the best for your home?

There are a variety of home water filtration systems on the market today. There's a type for every different need. While all water filters will remove impurities from your tap water, the kind of filter you choose will depend on what contaminants you want to keep.

Berkey Clean Water is here to help you decide which filter works best for your household. We're available 24/7. Contact us today.

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