To repair a dripping faucet, first shut off the water supply under the sink or at the main valve. Remove the faucet handle and disassemble the stem or cartridge, depending on the model. Inspect the washer, O-ring, or seat for wear or damage. Replace any damaged parts with manufacturer-specific components. Reassemble the faucet, ensuring a tight seal, and test for leaks. If the leak persists, consult a professional.

The repair process addresses common causes such as worn seals, loose components, or misaligned parts. According to the Environmental Protection Agency (EPA), fixing a dripping faucet can save up to 3,000 gallons of water annually, equivalent to the yearly usage of one person in developing nations. A 2021 study by the American Water Works Association found that 68% of residential leaks originate from faucets, emphasizing the importance of timely repairs. Replacing a damaged washer or O-ring costs less than $10, while ignoring the issue can lead to higher water bills and property damage. Data from the U.S. Department of Energy highlights that a single dripping faucet can waste 250 gallons of water monthly, underscoring the economic and environmental benefits of prompt maintenance. Proper installation ensures optimal pressure regulation, preventing future leaks and extending faucet lifespan.