How to Install a Pedestal Sink

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Looking for a bathroom update that’s as stylish as it is space-efficient? Look no further than the pedestal sink. In addition to being a design classic, pedestal sinks are also simple to install. Follow these easy steps to add a pedestal design to your bathroom.

Before You Begin

Many pedestal sink manufacturers include mounting instructions. Be sure to read these directions before beginning. Incorrect installations can result in leaks and major damage to your bathroom’s walls.

Instructions for Installation

Turn Off the Water
Shut off your old sink’s water supply and turn on the faucet to vent any pressure or water left in the lines.

Disconnect the Water Lines
Place a bucket below your sink’s drain pipe and loosen the nuts. Allow any excess water to drain and remove the pipe. Unscrew your sink’s water supply lines from the valves and set them aside. 

Remove the Vanity
Cut the sealant along the backsplash. Remove the backsplash and set it aside if it’s separate from your vanity. Remove the sealant holding the top of the vanity to the base. Double check to make sure all the drains and supply lines are free before lifting the vanity’s top.

All that’s left should be the bottom of the vanity. Loosen the screws holding the base to the wall and pull it away. Set the vanity base away from your working area.   

Double Check Your Plumbing
Your plumbing attachments should be visible.

Now is the time to replace old hardware or move the attachments to minimize their outline. It’s a good idea to hire a pro to help you move plumbing lines.

Install Support
Heavier pedestal designs may require extra support behind your finished wall. Your manufacturer’s instructions should tell you whether or not you need additional backing.

Follow these instructions if you do need additional support:

  1. Mark the height of the sink on your wall.
  2. Cut and remove the drywall to reveal your wall studs.
  3. Cut notches into the studs to hold your support board. Be sure your additional support is flush with the studs.
  4. Screw the support board into the studs.
  5. Repair the opening with new drywall or paint.

Center Your Sink
Find the centerline of your sink and mark it on the floor. Next, mark 10 inches from the wall. Be sure to factor in the baseboard. Place your sink on the marks and push it tight against the wall. Use a level to ensure your sink is flush.

Secure the Anchors
Mark the sink’s anchor and pedestal holes on the wall and floor, and drill each hole. Install hanger bolts in the wall holes. Be sure the hanger bolts extend 1 inch from the wall. Use a lag bolt and washer to secure the pedestal to the floor. Avoid overtightening the bolt.

Assemble the Sink
Attach your faucet and drain to the sink and set the sink bowl over the hanger bolts. Tighten the cap nuts and washers to secure the bowl to the wall. Reattach your plumbing lines and turn on the water supply.