Loosen the p trap.
Removing bathroom sink from wall.
Then place a bucket under the sink to catch any water remaining in the pipes as you disconnect them.
And water cut off valves are on the hot and cold water lines coming out of the wall.
How to remove a wall mounted bathroom sinks.
Removing backsplash use a razor knife to cut through caulking between the top of the backsplash and the wall.
How to remove a wall mounted sink step 1.
Turn off the water supply to the fixture at the two small water valves mounted on the wall beneath the sink.
Turn the water cut off valves under the sink.
Disconnect plumbing begin by turning off the hot and cold water shut off valves that are located beneath the sink.
Do the same for sidesplash.
If you want to remove the wall behind a bathroom sink but you plan to leave an existing commode or tub shower in place you must make provisions to vent those fixtures.