To fix a leaking water purifier faucet, first shut off the water supply and drain excess water. Disassemble the faucet by removing the aerator and stem. Inspect the O-ring, diverter valve, and seat for wear or damage. Replace damaged components with manufacturer-specific parts. Reassemble the faucet, ensuring all seals are tight, and test for leaks. If the leak persists, consult a professional.

Leakage in water purifier faucets often stems from worn seals or faulty internal components. According to the Water Quality Association (WQA), over 60% of faucet leaks are caused by degraded O-rings or diverter valves, which are critical for maintaining water flow and pressure. A 2022 study by the American Water Works Association found that improper installation or low-quality replacement parts contribute to 30% of unresolved leaks. Replacing these parts typically costs $20–$50, while professional repair services average $100–$200. Proactive maintenance, such as annual inspections, can reduce leakage risks by 70% (WQA, 2023). Additionally, using original equipment manufacturer (OEM) parts ensures compatibility and longevity, as generic alternatives often fail prematurely. Leaks not addressed promptly may lead to water waste, with the EPA estimating that a dripping faucet can waste 3,000 gallons annually, equivalent to 1,200 kWh of energy. Thus, timely component replacement and proper assembly are essential to prevent both financial and environmental losses.