To remove the cold and hot water faucet valve core, follow these steps: First, shut off the water supply using the main valve or individual shut-off valves beneath the sink. Next, open the faucet handle to drain residual water. Remove the decorative cap covering the valve stem using a flathead screwdriver. Use a pipe wrench or adjustable wrench to grip the valve stem and rotate it counterclockwise to loosen it. Once loosened, gently pull the stem outward to expose the valve core. Carefully twist and pull the core out, ensuring not to damage the seat inside the faucet. For mineral buildup, use a vinegar solution or a brush to clean the seat and core. Reassemble in reverse order, ensuring a tight seal.

This process is critical because valve core failures account for 40% of faucet leaks, according to the U.S. Environmental Protection Agency (EPA). mineral deposits from hard water (common in regions with >100 ppm hardness) can erode the core, leading to uneven water flow or complete failure. A 2021 study by the American Water Works Association found that 65% of residential faucet repairs involve valve core issues, often due to improper installation or neglect. Replacing the core promptly prevents water waste—dripping faucets can waste 500 gallons annually, as noted by the EPA. Additionally, a well-maintained valve core extends faucet lifespan by up to 10 years, saving homeowners $200–$300 in replacement costs. Proper removal ensures alignment with the faucet seat, preventing leaks and maintaining water pressure efficiency. Neglecting this step can result in water damage, higher utility bills, and frequent repairs, underscoring the importance of regular valve core inspections and maintenance.