Step 4 · Dry Fit Sink and Mark Mounting Locations
After patching the drywall (a full finish is not necessary behind the sink), perform a dry fit. Place the pedestal base where it will be installed. With a helper, carefully set the sink basin on top of the pedestal. Push the entire assembly against the wall, ensuring the sink basin is centered over the pedestal and is level both front-to-back and side-to-side. Use a pencil to trace the outline of the pedestal base on the floor. Then, reach behind the sink and mark the locations for the mounting bolts on the wall through the holes in the back of the sink. Carefully remove the sink and pedestal.