How to Connect Faucet Supply Lines?

Every one of us faces a plumbing situation at some point. Learn how to connect a faucet to the supply line step-by-step.

How to Connect Faucet Supply Lines?
Connect Faucet Supply Lines

Clogged, broken, damaged, or need to replace faucet line but don't know how? Then this article is for you. Whether in the kitchen sink or any water supply line, faucet lines play a vital role in ensuring a proper water supply.

But what if any problem arises and you require to fix it without hiring a plumbing service? The process is simple, and even you can do it by following some easy steps.

Let's know how to connect faucet supply lines yourself with a few handy instruments available at home.

How to Connect Faucet Supply Lines?

Before starting the task, you have to purchase the faucet according to your supply line parameters. However, buy something that fits the connection well as there are various types and sizes available.

When you have the tools and the new faucet, let's begin the work as follows:

Turn off the Water Supply

There is a shutoff valve with all the modern faucet connections. You have to turn it off before removing the old or damaged faucet. If necessary, turn off the main supply too. It will protect you from getting wet during the installation task.

Remove the Old One

You first need to remove the old one to place the new one, right? Unscrew the old faucet from the supply line. If there is any corrosion, gently rotate it. Otherwise, there can be some residue stuck inside the supply line thread. The faucet also may break and stay inside.

If the screw nuts are tighter than required, use a wrench to loosen up the connection and unscrew it. When removing the old one, make sure there is no residue and the threads inside are visible.

Incorporate Silicon

Some may categorize this as an unnecessary aspect. But sometimes, small things can make a considerable difference. Silicon ensures the health and leakage protection of your faucet and supply line.

It also creates a protective layer to eliminate the blank space between the two connected parts. Thus it protects lines from corrosion and seals the bond leakage. Another purpose is to make sure that the faucet connection will stay healthy for a long time.

Faucet Attachment

Now it's time for attaching the faucet. Get the tools such as a wrench for tightening the connection. Keep the nuts that come along with the faucet.

First, insert the nut and the threaded portion to the line. It will help if you put a gasket on the threaded portion to ensure a more secured line. Now use your hand to rotate and initially tighten the connection.

Then use a wrench to strengthen the connection further—no need to push harder. People tend to believe that the more you tighten up the connection, the more possibility of staying leakage-free. But this unnecessary act will make the next replacement procedure much harder.

Turn On the Shutoff Valve

You can open the shutoff valve to let the water enter the line for further inspection when you have done with the attachment.

Check for Leakage

Although there should not be any water leakage if your connection is okay, checking for leakage is necessary. Have a look underneath the connecting portion and see if there is any presence of water around the connection.

In most cases, a loose connection enables some water to leak. So you can tighten further to eliminate the leakage.

Aerator Check

The aerators are simple devices connected at the tip of the modern indoor faucets. The main function is to make an air and water mixture to make the flow more uniform.

You can easily unscrew it if you feel the water flow is insufficient. When you turn on the water supply for the first time, some substance from the old faucet may get stuck on the aerator. So, after removing those, you can place the aerator back.

Everything should work perfectly if you have successfully done the process right. You may struggle a few times, but eventually, it will be easier for you.


When you know the proper methods on how to connect faucet supply lines, you don't need to seek a plumber for this simple task.

Our suggestion is to replace any faulty faucet as soon as you figure it out. For instance, leakage can create corrosion to both the supply line and tap.

However, for any complicated problem, you must seek a professional. Otherwise, things may get worse.