If your kitchen sink water pressure remains low even after installing a brand-new faucet fixture, the restriction is located in the supply lines or valves. Common culprits include mineral sediment trapped inside the flexible supply line hoses, a partially closed wall shutoff valve, or clogged debris screens inside the new faucet inlet connectors. Furthermore, old galvanized supply pipes behind the wall may be heavily corroded internally. Verification: Disconnect the supply lines into a bucket and briefly open the shutoff valves to test incoming water flow and pressure.
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