The answer to 'my faucet installation is leaking' is that a leaking faucet is a common plumbing issue, but the cause can vary. Common causes include improper installation, worn washers or seals, or a damaged faucet cartridge. Symptoms may include water dripping from the faucet, puddles under the sink, or decreased water pressure.
If the leak is minor, you may be able to fix it yourself by replacing the washers or faucet cartridge. However, for more complex issues like a leaking faucet stem or a problem with the plumbing beneath the sink, it's best to call a professional plumber. They can diagnose the problem and make the necessary repairs to stop the leak and prevent further water damage.