Before you begin uninstalling your gold faucet bathroom, you should turn the water off. Locate the shutoff valves under the sink. Turn these valves into the "Off" position. Once you've turned off the water supply lines, you can move on to the next step. Remove the old faucet from the sink and countertop. Use the basin wrench to loosen it. Make sure you've removed the screws that hold the faucet in place.