2. Wall-mounted faucets. It is much easier to wipe a counter down with a wall-mounted faucet. To get this piece right, you'll need to know where the finished wall surface will fall once the backsplash is installed and where the sink will be centered so you have a faucet that comes out above the drain. Before the plumbers start roughing in pipes, every decision needs to be made or you risk ending up with elements that don't work well together.