How do I install a countertop wash basin?

To install a countertop wash basin, start by ensuring that the countertop is sturdy enough to support the weight of the basin when filled with water. Next, place the basin upside down on the countertop and mark the positions of the mounting holes. Drill holes in the countertop at these marked positions, taking care to use the appropriate size drill bit for the mounting hardware provided with the basin. Once the holes are drilled, apply a thin bead of silicone sealant around the underside edge of the basin where it will contact the countertop. Carefully place the basin onto the countertop, aligning it with the drilled holes. Secure the basin in place by tightening the mounting hardware through the drilled holes. Finally, wipe away any excess silicone sealant and allow it to cure according to the manufacturer's instructions.