To install the bathroom tap, remove any existing silicone caulk or screws, and cut a suitable hole in the countertop to accommodate the clips. Apply silicone sealant or caulk around the top edge of the sink. Make sure to seal the gap with the countertop. After removing the clips, install the sink. This simple process should take about an hour. If you are confident with your DIY skills, you can replace your kitchen-sink within a day.