TYPICAL PROCEDURE
STEP 1
Turn off water supply and turn on the faucet to drain the hot and cold water lines. Loosen the nuts on the drainpipe and detach it, leaving the stub. Disconnect the water lines from the valves. Remove the old vanity or sink.
STEP 2
Most pedestal sinks require a 2x8 support board. Mark the sink height on the wall. Take care with your measurements—they are critical with a pedestal sink. Cut out the wallboard and notch the studs with a Sawzall so that the support board can be recessed into them. Attach the support board with a power drill and screws. Repair the wall.
STEP 3
Measure the sink to find the center point and mark it on the wall and the floor. Extend the floor mark out 10 inches (including the baseboard) for the position of the base. Center the base on the mark, and rest the sink on the base, making sure it is flush against the wall. Adjust as needed. Check for level. Mark the sink’s anchor holes on the wall and the one for the base on the floor. (If your base doesn’t have anchor holes, it is secured with caulking.) Also check that the water supply lines and drainpipe are lining up properly with the base. Move the sink and pedestal out of the way.
STEP 4
Drill the holes using a power drill with a bit appropriate for the material on your wall—for example, a masonry bit for tile or brick walls. Hanger bolts are needed to secure the sink to the wall, so use a drill bit that is wide enough to accommodate them. Install the hanger bolts with 1" extended from the wall.
STEP 5
A lag bolt with a washer is often used to attach the base, but check the manufacturer’s instructions for the appropriate anchor needed because they vary. Set the pedestal base back into place and secure the lag bolt. Don’t overtighten because that may crack the porcelain. If your pedestal doesn’t require an anchor, this is the point where it is attached with caulking. Wipe any excess caulk away with a damp rag.
STEP 6
Attach the faucet and pop-up drain to the sink. Also, attach the drain assembly to the bottom of the basin. Place the sink into position over the hanger bolts. Check for level. Then secure the sink with cap nuts and washers, but don’t overtighten. Connect the drain and the water supply lines. Turn the water back on and check for leaks. If appropriate, apply caulk around the edge of the sink by the wall. Wipe with a damp rag to smooth. Let dry.