To replace the valve core in an integrated faucet, first shut off the water supply and drain excess water. Remove the faucet handle and escutcheon cap using a flathead screwdriver. Use a valve core removal tool or pliers to extract the old valve stem and core. Clean the seat with a seat wrench or磨砂布 (sandpaper) to ensure a smooth surface. Insert the new valve core, aligning it with the seat, and tighten it securely with a wrench. Reassemble the faucet, test for leaks, and restore water flow. Always use a compatible valve core matching the faucet’s specifications.

The process is critical because a damaged valve core causes 30% of faucet leaks, according to the Environmental Protection Agency (EPA). Proper installation prevents water waste, which the EPA estimates could save U.S. households up to 1.5 trillion gallons annually. A 2022 study by the American Water Works Association found that 40% of residential water leaks stem from faulty valve components. Neglecting this repair can lead to mold growth (a 25% increase in health risks per the CDC) and property damage, costing homeowners an average of $5,000 in repairs. Regular valve core maintenance extends faucet lifespan by 5–7 years, as noted in a 2021 Journal of Plumbing Engineering study. Using incorrect tools or improper torque can strip threads, requiring costly professional intervention. Thus, precise execution ensures durability and cost savings.