Fri. Dec 8th, 2023 When it comes to installing a double vanity in your bathroom, it’s important to consider the plumbing. Proper plumbing installation is essential for the efficient functioning of your double vanity. In this article, we’ll explain the process of plumbing a drain for a double vanity, step-by-step.Drain All

Materials Required

Before you begin the plumbing process, it’s important to have all the necessary materials on hand. Here’s a list of the materials required:

  • P-trap
  • PVC drain pipe
  • PVC pipe cement
  • Adjustable wrench
  • Plumber’s putty
  • Teflon tape
  • Screwdriver
  • Pipe cutter

Step 1: Shut off the Water Supply

Before starting any plumbing work, always turn off the water supply to the bathroom. This can be done by turning off the water valve located under the sink or by shutting off the main water supply to the house.

Step 2: Install the P-Trap

A P-trap is a U-shaped pipe that prevents sewer gases from entering your home. Install the P-trap by placing it under the drain opening of the sink. Ensure that the trap is positioned properly and securely attached to the tailpiece.

Step 3: Cut the PVC Drain Pipe

Using a pipe cutter, cut the PVC drain pipe to the appropriate length. Ensure that the pipe is long enough to connect the P-trap to the drain line.

Step 4: Apply PVC Pipe Cement

Apply PVC pipe cement to both ends of the PVC drain pipe. Ensure that the cement is applied evenly and thoroughly.

Step 5: Connect the PVC Drain Pipe to the P-Trap

Connect one Continuation:

end of the PVC drain pipe to the P-trap by sliding it over the P-trap’s outlet. Tighten the connection using an adjustable wrench.

Step 6: Connect the PVC Drain Pipe to the Drain Line

Connect the other end of the PVC drain pipe to the drain line. Apply Teflon tape to the threads of the drain line to ensure a watertight seal. Slide the PVC drain pipe over the drain line and tighten the connection with an adjustable wrench.

Step 7: Test the Drain

Before you complete the installation, it’s important to test the drain to ensure that there are no leaks. Fill the sink with water and let it drain. Check for any leaks around the connections. If there are leaks, tighten the connections until they are snug.

Step 8: Apply Plumber’s Putty

Apply plumber’s putty to the underside of the sink drain. This will ensure a watertight seal between the sink and the drain.

Step 9: Install the Sink Drain

Install the sink drain by placing it in the drain opening of the sink. Tighten the mounting bolts using a screwdriver.

Step 10: Connect the Water Supply

Finally, connect the water supply to the sink. Turn on the water supply and check for leaks. If there are no leaks, your double vanity is now ready to use.


Plumbing a drain for a double vanity may seem like a daunting task, but by following these simple steps, you can complete the installation efficiently and with confidence. Always remember to turn off the water supply before beginning any plumbing work and to test for leaks before completing the installation. With proper installation, your double vanity will function efficiently and provide years of use.


By Scarlett Watson

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