To fix leaks at cold and hot water faucet outlets, start by shutting off the water supply using the shut-off valves beneath the sink. Disassemble the faucet by removing the handle, escutcheon plate, and decorative cap. Inspect the cartridge or stem for wear, cracks, or mineral buildup. Replace damaged O-rings, seals, or springs. For compression faucets, tightening the stem or replacing the washer may resolve the issue. Reassemble the faucet in reverse, ensuring all components are aligned and secured. If the leak persists, consider professional repair or replacement, as complex issues like corroded pipes may require specialized tools.

Leakage at faucet outlets often stems from worn internal components, such as O-rings, seals, or cartridges, which degrade due to prolonged exposure to hot and cold temperatures. A 2021 study by the American Water Works Association found that 60% of faucet leaks are caused by faulty seals, with hot water components failing 20% faster than cold ones due to thermal stress. Additionally, mineral deposits from hard water accelerate corrosion, increasing repair frequency. Regular maintenance, including annual inspections and part replacements, can reduce leakage incidents by 75%, according to the EPA’s Water Efficiency Program. Using high-quality, temperature-resistant replacement parts ensures durability, as cheaper alternatives often fail prematurely. Addressing leaks promptly prevents water waste, with the EPA estimating that a single dripping faucet can waste 300 gallons of water annually. Proactive repair extends faucet lifespan, typically from 5–15 years to 10–20 years, while avoiding costly emergency calls.