Remodeling Tips and Reviews

How to install a pedestal sink and fixture

How to install a pedestal sink and fixture

Dec 24, 2011

When remodeling a bathroom people frequently opt for a pedestal sink for its sleek appearance and space saving design. Installing a pedestal sink is a fairly easy task if you follow some basic guidelines. Make sure you have turned off the main water supply to the house before proceeding. You should also have the manufacturers instructions to get a detailed look at the installation procedures.

First thing to do is to make sure the existing plumbing is up to the challenge. There will bePedestal Sink Installation a 1 1/2 or 1 1/4″ pipe from the wall that drains water, if this is an older pipe it needs to be inspected for wear. The supply lines will have 2 valves cutting off water. These should be easy to turn and should completely cut off the water. If they are frozen or dripping they should be replaced. Once inspection is done it time to move on to the pedestal.

We like to install the faucet to the pedestal first while we have it one the floor laying upside down. Generally speaking you will have 3 holes and simply take the faucet and center it on the three holes. The center hole usually has nothing in it until you install the drain assembly. Simply tighten down the two nuts that hold the faucet in place and go ahead and install the supply line hoses too. Then you will need to install the drain assembly. Do it in the following order:

  1. Adjust the large assembly nut on the drain pipe to a slightly larger size than the thickness of the sink.
  2. Using plumbers putty or the included rubber washer set the face portion of the drain into the sink and thread it together from the back side.
  3. Once it is tight to the make sure the pop up assembly hole on the side of the drain pipe is facing the back of the sink.
  4. Tighten down the main drain assembly nut to the bottom of the sink, making sure the rubber gasket is first.
  5. Install the tail pipe piece, make sure and use pipe compound or teflon tape. Otherwise this may leak later.
  6. Install the drain into the sink with the eye at its base facing the back of the sink. insert the drain control stem into the main drain pipe through the threaded hole on the side. Make sure you install the concave shaped washers around the ball in the correct order.
  7. Place on side of the extension arm retaining clip on the control rod then set put the extension on, then the other side of the retaining clip.
  8. Lastly feed the drain control rod through the top center of the faucet and connect it to the extension.  Set the drain inside the sink to the full open position and then  make sure the drain rod on the faucet is all the way down. Then tighten the nut holding the extension and rod together by hand, use a pair of pliers to tighten it a final 1/4 turn.

Once this is done the sink should be ready to go. All that is left is setting it in place, securing the sink to the wall and attaching everything to the house plumbing.  The pedestal stand should be set approximately 10-12″ from the wall. You should check it for level and consider shimming it if it is not level. Do a rough install of the sink and adjust the base as needed until the sink sits against the wall and is level. You then need to secure the sink to the wall. Assuming there is a wooden stud in the wall you can use the bolts that come with the sink. Mark where the holes are and remove the sink and predrill the holes with the correct sized drill bill. Reinstall the sink and secure it with the bolts. Be careful not to over tighten. If you have no wall stud to tie into then you will have to the wall anchors supplied and install them. We frequently will also use caulking on the back side of the pedestal to secure it to the wall. Once it has dried it is like glue.

Once the pedestal is secured to the wall you will need to install the pea trap and arm. Bathroom sinks use 1 1/4″ pipes so you may have to adjust the size if your wall is 1 1/2″ with a washer. Frequently, you will need an extension to reach the drain tail pipe coming from the sink. Cut these plastic or chrome pipes to size with a hacksaw. Once the waste is connected the supply lines can be tightened back to the wall valves and the entire install can be checked. Make sure the sink faucet handles are off before you turn back on the house water line. Then, turn on the sink valves at the wall slowly checking for leaks as you go. Tighten pipes as needed, and fill the sink all the way up with water, check that the overflow is working and do a full dump test to make sure your waste plumbing is sound. You should also remove the aerator at the end of the faucet to get a clean flush of the line. You may want to also run a nice bead of caulking around the pedestal where it meets the wall and possibly at the floor. I would recommend using clear on the floor if it is a clean finish.