Drop-In Sink
The drop-in sink is often called a self-rimming sink or surface mounted sink and is typically installed in a vanity counter top. This style sink is very common to older and newer construction and remodels alike. These sinks can be installed into any type of counter top including plastic laminate, stone, tiles or synthetic composite tops such as Corian® or Silestone®.
These sinks have a lip that is over-sized to the hole and they simply "drop in" a counter top and are pressure fit to the top surface with a clamp system from underneath. This creates a self trimming installation without the use of a frame. The bathroom sink itself is typically made from porcelain enameled cast iron or vitreous china. (Kitchen sink versions are often stainless steel). Plumbing waste and supply lines are concealed in the vanity base.
Framed Sink
See the tutorial Replacing an Existing Surface Mounted Sink
