Bathroom sink low water pressure
There are only three possible causes for low pressure at an isolated faucet: 1) The shut-off valve under the vanity is the wrong type of fitting, it is partially closed or it is defective; 2) the faucet aerator is partially blocked; or 3) the pipe feeding water to that particular faucet is clogged. Source: https://www.hunker.com/13417433/how-to-improve-the-water-pressure-in-a-bathroom-sink