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How to replace your bathroom faucet properly?

Updated: Oct 27, 2022

Some might wonder why they need a plumber to change their bathroom faucet. This blog post will answer this question. The act of changing a bathroom faucet requires a fair deal of precision. Here is how to replace your bathroom faucet.

How to change your bathroom faucet - Intro

Of course, replacing a faucet doesn’t require an expert in plumbing. However, one wrong move and you’ll risk breaking it altogether. If you can’t do this yourself, contact us, and we’ll solve your problem.

1. Disconnect the faulty faucet

To install the new faucet, you need to remove the old one. There are a few steps you should go one by one to achieve this.

1.1. Cut off the main water

Removing the old faucet without cutting the water supply will spill water all over, making it harder for you to either loosen the broken faucet or put a new one in place.

How to change your bathroom faucet - Cut off the main water

This can be done by locating the supply valve underneath the sink and turning that off.

1.2. Detach the supply line

How to change your bathroom faucet - detach the faucet from the supply line

The faucet must be detached from the water supply line for us to remove it entirely. Then, we can move on to disconnecting the lift rod, taking out the nuts, and finally, the faulty faucet. Remember to take a picture of the original setup to assemble the components later.

2. Take out the drain

If your new faucet doesn’t match the old drain, you should also take the drain out. Start by disconnecting the P-Trap.

How to change your bathroom faucet - Dislocate the P-trap

Next, dislocate the drain from the sink and remove it (including the sink stopper).

How to change your bathroom faucet - Remove the drain

Tips: Prepare a bucket to catch water coming out of the drain.


Make sure to clean all the holes off of silicon sealant. You can easily do this by using mineral spirits.

How to change your bathroom faucet - Clean the holes

3. Setting up the new faucet

Before doing the installation, make sure that your new faucet has the same number of holes in the sink. Different types of sinks possess different numbers of holes, ranging from 1 to 3.

3.1. Putting the faucet on

How to change your bathroom faucet - Putting the new faucet on

Depending on the type of faucet, you might need to put on the gasket first, before inserting the faucet through the holes. When everything is in place, tighten all the nuts.

3.2. Install the drain and rubber washer back on

How to change your bathroom faucet - Putting the rubber washer and the drain back on

You’re now assembling the drain and the rubber washer. Connect them through the top of the sink. Remember to clean up any spilled silicon.

3.3. Install the lift rod

How to change your bathroom faucet - Install the lift rod

Next, connect the lift rod to the new faucet. Depending on the kind of faucet, you might need to install the ball rod before connecting the lift rod.

3.4. Install the supply line

In this step, you want the supply line to connect to the faucet shanks first. Then, connect the supply line to the valves of the new faucet.

3.5. Turn the faucet on and check for leakage

When the new faucet is installed, turn it on and off to check for dripping or leakage. Take the aerator out, then let hot and cold water run through the new faucet for a minute.

How to change your bathroom faucet - Turn on the faucet and check for leakage

If no leakage is found, simply install the new aerator, and you’re done.


Those are the steps on how to replace your bathroom faucet. It’s not entirely an easy task, and should not be done without prior experience. Call us if you need your bathroom faucet replaced if you don’t want to go through the hassle.


Contact Local Rooter Corp.

If you would like a free quote on inspecting your plumbing system in San Jose and surrounding areas, our professional plumbers at Local Rooter are here to assist you. Call us at 408-641-9245 or contact us here

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