A tap leaking directly from around the handle or lever is typically caused by a worn-out O-ring, a damaged stem packing seal, or a failing internal cartridge. As you lift or twist the handle daily, friction and hard water erode these internal rubber seals, allowing water to bypass the valve body and seep upward around the handle stem whenever the water is turned on. Callout type="warning" title="Hygiene Warning": Shut off the water supply valves under the sink before beginning repairs. Verification: Turn the water back on and operate the handle to confirm zero leakage around the stem.
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