When replacing a pedestal sink with a different type of sink the biggest issues you have to solve are related to the difference in the plumbing required for the new sink. This article is about the things you have to consider when replacing a pedestal sink with a vanity sink.

Removing the old pedestal sink

  1. Close the shut-off valves to prevent water spillage
  2. Disconnect the water lines from the faucet
  3. Disconnect the sink from the drain pipe
  4. Unscrew the sink from the wall
  5. Remove the sink
  6. Remove the bolts that fasten the pedestal to the floor (if any)
  7. Remove the pedestal

Install the new sink

Start with these two steps (not covered in this post):

  1. Install the faucet on the new sink. You can reuse the old one or use a new one.
  2. Fasten the new sink to the wall (the method depends on your situation and your type of sink)

If there is a difference in height between the new and the old sink you will have to do some plumbing work. In this particular case we had to extend the water lines and the drain pipe because the new vanity was taller.

Extending the water lines

Extensions

For the water lines we used 12″ flexible water connectors (Speedi Plumb PLUS by Brass Craft).

To connect the water connectors to the PEX water lines installed by the builder we used 2 straight adapters (PEX 1/2″ to 3/8″ compression).

Adapter

We cut off the old faucet connectors installed on the PEX pipes and fastened the adaptors to the PEX pipes with crimp rings using a crimper tool.

Now we are able to connect the faucet to the water lines using the flexible water connectors.

Extending the drain pipe

Extension tube

For the drain pipe we used a chrome plated extension tube 1 1/4 x 6″ (slip joint, 22 gauge)

Installing the drain flange

To be sure that the pop-up stopper will hold the water in the sink when you need it you also have to be sure the drain flange is installed properly and it doesn’t lose water. To install it properly you need to use plumber’s putty like in this picture.

Sink Drain Flange

Some people use silicone caulk instead of putty but I don’t recommend this solution because it will make your life more complicated when you need to do some more work to the sink in the future.

Sink Drain Flange

In the end you want to apply silicone caulk between the sink edge and the wall to prevent water from going there.

Vanity Sink

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