How to Install a Water Faucet 2026

Installing a water faucet or faucets is a job that we normally leave in the hands of experts, but the truth is that it is simpler than it seems.

We only need to have the pipes or water outlets in their correct position to be able to do this work ourselves.

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Here we present a guide that will teach you how to recognize the types of faucets, their installation methods and some information so that your faucet system works correctly.

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Tools to install a water faucet:

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• Bucket
• Adjustable or French wrench
• Stillson or English wrench

Materials to use:

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• Faucet or faucet to be installed in the bathroom
• Kitchen faucet or faucet to be installed
• Teflon

Steps on how to install a water faucet

A good way to start is by recognizing the types of keys that may be in the home. This will help us find the correct spare part, choose the right key for a new appliance and, most importantly, know how to install it.

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Independent Key

It is made up of individual controls, that is, a faucet for hot water and another for cold water. The fixture must have a hole for each faucet, but they can also be installed without fixtures, directly to the pipe, in the garden or laundry room.

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Combination Key

It is made up of two independent command keys, but with a common tap in the center. To be used in sinks it must have three holes and in dishwashers or showers only two, since the tap is in the air.

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Single-lever faucet

It is made up of a body that receives the water and a mixer that moves sideways to obtain hot or cold water. Appliances that use this system only need a hole for water inlet.

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Monoblock key

It is made up of two independent command keys, but with a common tap in the center. To be used in sinks it must have three holes and in dishwashers or showers only two, since the tap is in the air.

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Before you start

• Close the stopcock: to avoid risks it is necessary to turn off the water

If we want to replace an existing key we must also:

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• Open the faucet to let out the water contained in the pipe.
• Remove old key: you need the same tools as to install it. First we disconnect the flexibles, it is good to put a bucket underneath because water will surely come out. Removing the key can be done in two ways, depending on the model: unscrewing the nuts under the appliance or releasing the handle and body to remove it from above.
• Clean the appliance of scale and fungus.

What's behind the key?

The key works thanks to the work of three elements, it is better to know them to carry out the installation correctly.

a. Pipes:
They are copper or PVC tubes through which the water circulates, it is a network that comes from the central supply to the house, distributing the water to the bathroom, kitchen and garden.

b. Flexible:
They are rubber tubes covered with stainless steel rings. One end is screwed to the stopcock and the other to the tap.

c. Pass Keys:
They are the keys that cut off or open the water supply, there is a general one for the house and other local ones in the bathroom, kitchen, laundry room and garden. Hot and cold water have independent taps. To make any repair or installation in the system we must cut the stopcock closest to the
key to install.

A. Independent and combination key: INSTALLING A KEY ON AN APPLIANCE

The installation can be done with the flexibles connected to the pipes

#1. Insert water inlet

• Insert the water inlets into the holes of the appliance, ensuring that the hot or red water tap is on the left side and the cold or blue water tap is on the right.

#2. Place rubber and grommet

• Under the appliance, place the rubber and the washer in each of the water inlets, screwing them until they stop.

#3. Fix nut

• Next comes the turn to put the nut on. Use the Stillson wrench, which helps access hidden nuts to tighten or loosen them more easily.

#4. Make flexible

• Then put the flexible hoses in each of the water inlets. For this we screw the flexible nut to the water inlet of the faucet. Again use the Stillson wrench to ensure that the nut is tight.

RECOMMENDATION
As you tighten the nuts, it is good to make sure the wrench is properly aligned with the edge of the fixture. This avoids tilts.

B. Single-lever and Monoblock Faucets: INSTALLING A KEY IN AN APPLIANCE

To carry out the installation, the flexibles cannot be connected to the pipes.

#1. Put washer on the key

• Put the rubber washer under the key, which must fit perfectly to seal the key with the appliance cover.

#2. Screw the flexibles into the key

• Screw the flexible hoses into the hot and cold water connectors of the faucet. Making sure that the hot water hose is in the left connector and the cold water hose is in the right.

#3. Introduce flexibles to the artifact

• Insert the flexible ones through the hole of the device, leaving them hanging while we seat the key in the cover.

#4. Fix faucets

• From below the appliance, secure the faucet with a bolt, screwing it in by hand until it is tight.

#5. Put stamps

Recommendation

If when replacing an individual or combination faucet with a single-lever or monoblock faucet there are extra holes in the appliance, we must choose one of them to carry out the installation and seal the others with stainless steel plugs, a rubber band and a little silicone.

• Then slide the rubber seal and the metal plate up the bolt, both in the shape of a half-moon, until they are flush with the device.
• Depending on the model, some single-lever and monoblock faucets need a rubber washer and another metal one before the half-moon-shaped piece.

#6. Connect flexible

• Connect the flexibles to the pipe.

#7. Tighten pieces

• To tighten all these pieces, a nut must be screwed with the help of the Stillson wrench.

C. INSTALLATION OF KEY TO THE WALL

They are installed in showers, bathtubs, bidets or above vanities.

#1. Connect flexible

• To carry out the installation, the pipes with the hot and cold water outlets must protrude from the wall, but be flush with the ceramic covering. The distance between the two should not be more than 16 cm. The pipe must have a terminal with internal wire (HI), otherwise it must be soldered.

#2. Prepare eccentrics

• Put Teflon on the threads of the eccentrics to screw them into the pipes. Teflon is a tape that prevents leaks and better seals the joints of pieces.

#3. Put extratricas

• Screw an eccentric into each pipe, which adapts the distance between the water outlets to match exactly the width of the tap. To make it tight we use an adjustable wrench.

Eccentrics:

S-shaped nuts that allow you to adapt water outlets that do not coincide exactly with the faucet. They allow a displacement of 1 cm in each connection.

#4. Assemble cymbals

• Assemble the decorative plates that hide the connection of the eccentric with the pipe

#5. Place rubber stamp

• Put the rubber seal on the water inlets of the faucet. If the key does not have this rubber built in, Teflon should be used as a replacement.

#6. Fix faucets

Fix the faucet by joining its nuts with the eccentrics. Tighten with the help of an adjustable wrench until you find resistance.

#7. Install accessories

• In the case of a “telephone” shower faucet, its flexible tube must be connected to the special fitting for this connection.

RECOMMENDATION

In shower or bathtub faucets it is common for the nuts to be visible, so when fixing it with the adjustable wrench, we cover it with a cloth so as not to damage its chrome part.

D. FINISHING INSTALLING THE WATER FAUCET

Whatever faucet has been installed, it is important to do a general check to ensure that the work had a good result and that there will be no leaks.
Review:

• Give stopcock
• Make the keys work
• Check that the water comes out normally
• Look for possible leaks in the flexibles.

If you notice any leak problems, retighten the nuts with the adjustable or Stillson wrench, as appropriate. If the problem persists, disconnect everything and reinstall the water faucet.

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