Replacing a faucet is a bit more of a job than just replacing a faucet stem or O-ring. However, you can definitely learn how to do this yourself, even if you've never fixed a faucet by yourself before. You don't need to be a plumber or have any special knowledge. Just following instructions carefully and having the right tools is all that's needed.

Most new faucet units these days are intended to be installed by the consumer. Any time you buy a new faucet, whether it's to fix a noisy faucet or whatever other problem you may be having, the part will come with some easy-to-follow DIY instructions. Simply paying attention and following the instructions to the letter, you can do as good a job as a trained plumber. Plus, you'll save a ton of money (plumbers are expensive these days).
Why might you want to install a new faucet? Here are 4 good reasons:
  • upgrade your fixtures to give your bathroom or kitchen a new look
  • fix a leaky faucet
  • fix a dripping faucet
  • fix any other problems with the old faucet
Whatever your reason, you will need certain tools if you want to replace your faucet without calling a plumber. You might want to print out this list and take it to the hardware store with you. Or, if you want to save money on tools, just order the faucet repairing tools online and have them delivered. If you are not in a huge hurry, this is really the best option. As long as you know what you're looking for, you can typically save money when you order tools online for cheap.
Basic Tools for Replacing your Faucet
  • Replacement faucet
  • Adjustable or basin wrenches
  • Plumbers' putty
Here are a few things to think about before you place your order for tools and equipment:
  • What size do you need? For example, the faucet unit needs to cover your old faucet's mounting holes completely or it will look funny.
  • Do you have an unusual sink in your bathroom or kitchen? If so, keep an eye out for a faucet unit that is designed to be adjustable and will fit more than just one type of sink.
  • What about color and style? If you're not replacing all your fixtures, you should buy a replacement faucet that either matches perfectly or complements your existing fixtures. This may sound obvious, but you'd be surprised how many people do not think about this when they are buying a new faucet for their bathrooms or kitchens!
Okay, so go ahead and choose your faucet model keeping everything above in mind.
The next thing is of course the installation. This is where you may be feeling a bit nervous if you haven't done this before. Don't worry - just because you've never replaced your faucet before doesn't mean you won't be just as capable; take it slow and be patient with yourself and you will do a great job. Then next time it will be that much easier.
How Do I Install a Replacement Faucet in My Sink?
For these instructions we are going to imagine that you are installing the faucet in your kitchen sink rather than your bathroom. If you want to replace your bathroom sink faucet, make sure you continue reading all the way to the article's end because there will be just a couple differences to keep in mind.
12 Steps to Replace Your Kitchen Sink Faucet
  1. Turn off the water supply.
  2. Loosen the nuts with an adjustable wrench or basin wrench.
  3. Disconnect the faucet from the water supply pipes that are underneath the sink.
  4. If the old assembly has a spray head and hose, you'll need to remove the spray head mounting nut, which is located underneath your sink. You should also disconnect the hose from its spout connection.
  5. Remove the old faucet assembly from your sink.
  6. Clean the sink around the faucet mounting area.
  7. Apply plumbers' putty around the base of the faucet. Your new faucet might have come with gaskets in the kit, and they serve the same purpose, so in that case you don't need to worry about the putty.
  8. If your new faucet has a spray hose, now is when you will attach this hose. First, run the spray hose down through its opening in the faucet assembly. Then run it through its opening in the sink, and finally run it up through the sink's center opening. Then you'll just need to attach the hose to the supply stub on the faucet.
  9. Install the new faucet assembly into the mounting holes in the sink. Put the washers and nuts on the assembly's mounting studs under the sink. Tighten them with your hand. As you tighten the washers and nuts make sure the assembly remains in the correct position and doesn't move around. Align any gaskets correctly. Once everything is in place and you've tightened it with your hand as much as possible, use your basin wrench to give the parts a final twist and get them nice and tight.
  10. Connect the original water supply lines to the flexible supply tubes that come out from the new faucet. Make sure they are properly aligned. Check which lines are for hot and cold water as if you get these mixed up, you will have hot water coming out of your cold faucet and vice versa! For this part of the job, you will need two wrenches. You will use one wrench to hold the fitting, and at the same time, turn the nut on the water supply line with the other wrench.
  11. Turn on the hot and cold water supplies.
  12. Run both hot and cold water out of the tap. Turn the faucets on full force when you do this. This will clear the supply lines and enable you to make sure the fixture is not leaking. Do you see any leaks? If so, you will need to go back over the steps, removing the parts you've installed, and check for loose connections. Before you do this, remember to turn off the water supply again.
Replacing your bathroom faucet is a very similar task to replacing a kitchen faucet, as I mentioned before. However, there are a few small differences. Here are the main things to keep in mind when you install a new bathroom faucet.
How Do I Replace My Bathroom Faucets?
When you replace your bathroom sink faucet, you will basically go through the same steps I outlined above. There may be a couple of additional steps, however. They include:
  • A pop-up drain plug may be connected to your old faucet assembly. You will need to disconnect this from the old faucet before you remove it from the basin.
  • What if you need to replace your shower faucet or tub faucet rather than the faucet in your bathroom sink? Yes, still possible for you to do on your own, but please understand this will be slightly more challenging. It's not really that much harder, it's just that it is more time-consuming. this is because the connections are behind a wall. If you're lucky, you will have an access panel which lets you access the pipes without needing to rip your whole bathroom wall apart. If you do have to take out the whole wall, this is probably a good time to add an access panel in case you want to do any more pipe and faucet repairs in the future.
Once you are at the point of working on the tub faucet connections, the actual job is no more difficult than replacing a kitchen sink faucet. You will basically follow the same detailed instructions as above, but here is a quick summary:
  1. Shut off the water supply
  2. Remove the faucet handle on the tub side
  3. Disconnect the old faucet unit from the back
  4. If there's an old shower head pipe, unscrew it from its pipe inside the wall
  5. Unscrew the tub spout from the wall
  6. Install all the new parts. Your new assembly will come with detailed instructions, so just follow these and you will be fine.