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How to Install a Bathroom Vanity


  1. Introduction
  2. Tools and Materials Needed
  3. Preparation
  4. Installing the New Vanity
  5. Connecting the Plumbing
  6. Finishing Touches
  7. FAQs


Installing a new bathroom vanity is a great way to update the look and functionality of your bathroom. This guide will walk you through the process of removing your old vanity and installing a new one, including connecting the plumbing and adding finishing touches.

Tools and Materials Needed

  • Adjustable wrench
  • Basin wrench
  • Screwdrivers (Phillips and flat-head)
  • Tape measure
  • Level
  • Stud finder
  • Utility knife
  • Plumber’s putty
  • Silicone caulk
  • Caulking gun
  • Drill and bits
  • Pipe wrench
  • Bucket
  • Towels
  • Vanity and vanity top
  • Faucet
  • Water supply lines
  • P-trap and drain assembly
  • Mounting screws and brackets


Measure the Space

  • Measure Dimensions: Measure the width, depth, and height of the space where the new vanity will be installed.
  • Check Clearances: Ensure there is enough clearance for doors, drawers, and plumbing connections.

Turn Off the Water Supply

  • Shut Off Valves: Locate the water shut-off valves under the sink and turn them off.
  • Drain Water Lines: Turn on the faucet to drain any remaining water from the lines.

Remove the Old Vanity

  • Disconnect Plumbing: Use a wrench to disconnect the water supply lines and the P-trap from the drain.
  • Remove Vanity Top: Cut through any caulk sealing the vanity top to the wall with a utility knife and lift it off.
  • Detach Vanity from Wall: Remove screws or nails securing the vanity to the wall, then carefully pull the vanity away from the wall.

Installing the New Vanity

Position the New Vanity

  • Place Vanity: Position the new vanity in the desired location.
  • Level Vanity: Use a level to ensure the vanity is level. Adjust the feet or shim under the base if necessary.

Attach the Vanity to the Wall

  • Locate Studs: Use a stud finder to locate wall studs and mark their positions.
  • Secure Vanity: Drill pilot holes through the back of the vanity into the studs, then attach the vanity to the wall using mounting screws and brackets.

Install the Vanity Top

  • Apply Adhesive: Apply a bead of silicone caulk around the top edges of the vanity base.
  • Set Vanity Top: Carefully place the vanity top onto the base, pressing down firmly to secure it.
  • Align and Level: Ensure the vanity top is aligned and level.

Connecting the Plumbing

Install the Faucet

  • Assemble Faucet: Follow the manufacturer’s instructions to assemble the faucet.
  • Mount Faucet: Insert the faucet into the designated holes on the vanity top and secure it with the mounting nuts provided.

Connect the Water Supply Lines

  • Attach Supply Lines: Connect the flexible water supply lines to the faucet and tighten them with an adjustable wrench.
  • Connect to Shut-Off Valves: Attach the other end of the supply lines to the shut-off valves and tighten.

Attach the Drain Assembly

  • Assemble Drain: Follow the manufacturer’s instructions to assemble the drain and P-trap.
  • Apply Plumber’s Putty: Apply plumber’s putty to the underside of the drain flange and insert it into the drain hole.
  • Tighten Connections: Connect the P-trap to the drain pipe and tighten all connections.

Finishing Touches

Seal the Edges

  • Apply Caulk: Apply a bead of silicone caulk around the edges of the vanity top where it meets the wall.
  • Smooth Caulk: Smooth the caulk with a caulk finishing tool or your finger for a clean finish.

Install Hardware

  • Attach Handles and Knobs: Install any handles or knobs on the vanity doors and drawers.
  • Check Functionality: Ensure all doors and drawers open and close smoothly.


How long does it take to install a bathroom vanity?

The process can take anywhere from a few hours to a full day, depending on your experience and the complexity of the installation.

Do I need to hire a plumber to install a bathroom vanity?

If you are comfortable with basic plumbing tasks, you can install the vanity yourself. However, if you encounter complex plumbing issues, it may be best to hire a professional.

Can I install a new vanity without replacing the countertop?

Yes, if your existing countertop is in good condition and fits the new vanity, you can reuse it. Just be careful when removing it from the old vanity.

What should I do if the vanity is not level?

Use shims under the base of the vanity to level it. Adjust until the vanity is perfectly level.

How do I choose the right size vanity for my bathroom?

Measure the available space in your bathroom and consider the layout. Choose a vanity that fits comfortably in the space without obstructing movement or other fixtures.

By following these steps, you can successfully install a new bathroom vanity, enhancing the look and functionality of your bathroom.

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